arm: adi: Adding platform subdirectory to Makefile

Adding sc5xx platform for compilation

Signed-off-by: Utsav Agarwal <utsav.agarwal@analog.com>

Author: UtsavAgarwalADI

arch/arm/Makefile

@@ -215,6 +215,7 @@ machine-$(CONFIG_ARCH_RPC)		+= rpc
 machine-$(CONFIG_PLAT_SAMSUNG)		+= s3c
 machine-$(CONFIG_ARCH_S5PV210)		+= s5pv210
 machine-$(CONFIG_ARCH_SA1100)		+= sa1100
+machine-$(CONFIG_ARCH_SC5XX)		+= sc5xx
 machine-$(CONFIG_ARCH_RENESAS)	 	+= shmobile
 machine-$(CONFIG_ARCH_INTEL_SOCFPGA)	+= socfpga
 machine-$(CONFIG_ARCH_STI)		+= sti