MIPS: Loongson: Define rtc device on MC146818-equipped systems

This patch declare the rtc device present on systems with clock compatible
with the mc146818 and handled by rtc-cmos.  Introduce a new Kconfig entry
because there are some systems without rtc_cmos compatible clock.

Signed-off-by: Arnaud Patard <apatard@mandriva.com>
To: linux-mips@linux-mips.org
Cc: aba@not.so.argh.org
Patchwork: http://patchwork.linux-mips.org/patch/1320/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig
index 3df1967..c97ca69 100644
--- a/arch/mips/loongson/Kconfig
+++ b/arch/mips/loongson/Kconfig
@@ -23,6 +23,7 @@
 	select GENERIC_HARDIRQS_NO__DO_IRQ
 	select GENERIC_ISA_DMA_SUPPORT_BROKEN
 	select CPU_HAS_WB
+	select LOONGSON_MC146818
 	help
 	  Lemote Fuloong(2e) mini-PC board based on the Chinese Loongson-2E CPU and
 	  an FPGA northbridge
@@ -51,6 +52,7 @@
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select SYS_SUPPORTS_HIGHMEM
 	select SYS_SUPPORTS_LITTLE_ENDIAN
+	select LOONGSON_MC146818
 	help
 	  Lemote Loongson 2F family machines utilize the 2F revision of
 	  Loongson processor and the AMD CS5536 south bridge.
@@ -83,3 +85,7 @@
 	bool
 	default y
 	depends on EARLY_PRINTK || SERIAL_8250
+
+config LOONGSON_MC146818
+	bool
+	default n