MSCC: add support for Ocelot SoCs

This family of SoCs are found in the Microsemi Switches solution and have
already a support in the linux kernel.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 802244a..124e93f 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -15,6 +15,7 @@
 machine-$(CONFIG_ARCH_BMIPS) += bmips
 machine-$(CONFIG_MACH_PIC32) += pic32
 machine-$(CONFIG_ARCH_MT7620) += mt7620
+machine-$(CONFIG_ARCH_MSCC) += mscc
 
 machdirs := $(patsubst %,arch/mips/mach-%/,$(machine-y))
 libs-y += $(machdirs)