MIPS: Map CM Global Control Registers

Map the Global Control Registers (GCRs) provided by the MIPS Coherence
Manager (CM) in preparation for using some of them in later patches.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
diff --git a/arch/mips/cpu/Makefile b/arch/mips/cpu/Makefile
index fc6b455..429fd3a 100644
--- a/arch/mips/cpu/Makefile
+++ b/arch/mips/cpu/Makefile
@@ -7,3 +7,5 @@
 obj-y += time.o
 obj-y += interrupts.o
 obj-y += cpu.o
+
+obj-$(CONFIG_MIPS_CM)	+= cm_init.o