mips: mscc: Add generic PHY MIIM utility functions

The PHY MIIM utility functions can/will be used for board detection
purposes.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
diff --git a/arch/mips/mach-mscc/Makefile b/arch/mips/mach-mscc/Makefile
index 6c60f26..300c88b 100644
--- a/arch/mips/mach-mscc/Makefile
+++ b/arch/mips/mach-mscc/Makefile
@@ -2,5 +2,5 @@
 
 CFLAGS_cpu.o += -finline-limit=64000
 
-obj-y += cpu.o dram.o reset.o lowlevel_init.o
+obj-y += cpu.o dram.o reset.o phy.o lowlevel_init.o
 obj-$(CONFIG_SOC_LUTON) += lowlevel_init_luton.o