xtensa: replace variant/core.h with asm/core.h

Introduce the header arch/xtensa/include/asm/core.h that provides
definitions for XCHAL macros missing in older xtensa releases. Use this
header instead of variant/core.h

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
diff --git a/arch/xtensa/include/asm/asmmacro.h b/arch/xtensa/include/asm/asmmacro.h
index 7f2ae58..8308a9c 100644
--- a/arch/xtensa/include/asm/asmmacro.h
+++ b/arch/xtensa/include/asm/asmmacro.h
@@ -11,7 +11,7 @@
 #ifndef _XTENSA_ASMMACRO_H
 #define _XTENSA_ASMMACRO_H
 
-#include <variant/core.h>
+#include <asm/core.h>
 
 /*
  * Some little helpers for loops. Use zero-overhead-loops
diff --git a/arch/xtensa/include/asm/cache.h b/arch/xtensa/include/asm/cache.h
index d2fd932..b21fd13 100644
--- a/arch/xtensa/include/asm/cache.h
+++ b/arch/xtensa/include/asm/cache.h
@@ -11,7 +11,7 @@
 #ifndef _XTENSA_CACHE_H
 #define _XTENSA_CACHE_H
 
-#include <variant/core.h>
+#include <asm/core.h>
 
 #define L1_CACHE_SHIFT	XCHAL_DCACHE_LINEWIDTH
 #define L1_CACHE_BYTES	XCHAL_DCACHE_LINESIZE
diff --git a/arch/xtensa/include/asm/checksum.h b/arch/xtensa/include/asm/checksum.h
index f302ef5..8b68717 100644
--- a/arch/xtensa/include/asm/checksum.h
+++ b/arch/xtensa/include/asm/checksum.h
@@ -13,7 +13,7 @@
 
 #include <linux/in6.h>
 #include <linux/uaccess.h>
-#include <variant/core.h>
+#include <asm/core.h>
 
 /*
  * computes the checksum of a memory block at buff, length len,
diff --git a/arch/xtensa/include/asm/coprocessor.h b/arch/xtensa/include/asm/coprocessor.h
index 6712929..0fbe2a7 100644
--- a/arch/xtensa/include/asm/coprocessor.h
+++ b/arch/xtensa/include/asm/coprocessor.h
@@ -12,8 +12,8 @@
 #ifndef _XTENSA_COPROCESSOR_H
 #define _XTENSA_COPROCESSOR_H
 
-#include <variant/core.h>
 #include <variant/tie.h>
+#include <asm/core.h>
 #include <asm/types.h>
 
 #ifdef __ASSEMBLY__
diff --git a/arch/xtensa/include/asm/core.h b/arch/xtensa/include/asm/core.h
new file mode 100644
index 0000000..b1f5751
--- /dev/null
+++ b/arch/xtensa/include/asm/core.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2019 Cadence Design Systems Inc. */
+
+#ifndef _ASM_XTENSA_CORE_H
+#define _ASM_XTENSA_CORE_H
+
+#include <variant/core.h>
+
+#ifndef XCHAL_SPANNING_WAY
+#define XCHAL_SPANNING_WAY 0
+#endif
+
+#endif
diff --git a/arch/xtensa/include/asm/initialize_mmu.h b/arch/xtensa/include/asm/initialize_mmu.h
index 10e9852..d719785e 100644
--- a/arch/xtensa/include/asm/initialize_mmu.h
+++ b/arch/xtensa/include/asm/initialize_mmu.h
@@ -33,10 +33,6 @@
 #define CA_WRITEBACK	(0x4)
 #endif
 
-#ifndef XCHAL_SPANNING_WAY
-#define XCHAL_SPANNING_WAY 0
-#endif
-
 #ifdef __ASSEMBLY__
 
 #define XTENSA_HWVERSION_RC_2009_0 230000
diff --git a/arch/xtensa/include/asm/irq.h b/arch/xtensa/include/asm/irq.h
index 6c6ed23..0f71a51 100644
--- a/arch/xtensa/include/asm/irq.h
+++ b/arch/xtensa/include/asm/irq.h
@@ -12,7 +12,7 @@
 #define _XTENSA_IRQ_H
 
 #include <linux/init.h>
-#include <variant/core.h>
+#include <asm/core.h>
 
 #ifdef CONFIG_PLATFORM_NR_IRQS
 # define PLATFORM_NR_IRQS CONFIG_PLATFORM_NR_IRQS
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 0c14018..19f6b54e3 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -10,7 +10,7 @@
 #ifndef _XTENSA_PROCESSOR_H
 #define _XTENSA_PROCESSOR_H
 
-#include <variant/core.h>
+#include <asm/core.h>
 
 #include <linux/compiler.h>
 #include <linux/stringify.h>
diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h
index 62a58d2..b109416 100644
--- a/arch/xtensa/include/asm/ptrace.h
+++ b/arch/xtensa/include/asm/ptrace.h
@@ -80,7 +80,7 @@ struct pt_regs {
 	unsigned long areg[16];
 };
 
-#include <variant/core.h>
+#include <asm/core.h>
 
 # define arch_has_single_step()	(1)
 # define task_pt_regs(tsk) ((struct pt_regs*) \
diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h
index 7111280..79fe300 100644
--- a/arch/xtensa/include/asm/vectors.h
+++ b/arch/xtensa/include/asm/vectors.h
@@ -18,7 +18,7 @@
 #ifndef _XTENSA_VECTORS_H
 #define _XTENSA_VECTORS_H
 
-#include <variant/core.h>
+#include <asm/core.h>
 #include <asm/kmem_layout.h>
 
 #if XCHAL_HAVE_PTP_MMU