i386/x86_64: move headers to include/asm-x86

Move the headers to include/asm-x86 and fixup the
header install make rules

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Kbuild b/Kbuild
index 2d403cf..1570d24 100644
--- a/Kbuild
+++ b/Kbuild
@@ -8,7 +8,7 @@
 # 1) Generate asm-offsets.h
 #
 
-offsets-file := include/asm-$(ARCH)/asm-offsets.h
+offsets-file := include/asm-$(SRCARCH)/asm-offsets.h
 
 always  := $(offsets-file)
 targets := $(offsets-file)