feat(versal-net): add support for SMCC ARCH SOC ID

Add support for SMCCC_ARCH_SOC_ID as per SMC Calling Convention for
Versal NET platform.
The SMCC ARCH SOC ID call is used by system software to obtain the SiP
defined SoC identification details.

Change-Id: I6648051c7f5fa27d2f02080209da36ee8d5a9d95
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
diff --git a/plat/xilinx/versal_net/platform.mk b/plat/xilinx/versal_net/platform.mk
index be1200b..da83c3a 100644
--- a/plat/xilinx/versal_net/platform.mk
+++ b/plat/xilinx/versal_net/platform.mk
@@ -99,6 +99,7 @@
 BL31_SOURCES		+=	plat/xilinx/common/plat_startup.c		\
 				plat/xilinx/common/ipi.c			\
 				plat/xilinx/common/ipi_mailbox_service/ipi_mailbox_svc.c \
+				plat/xilinx/common/versal.c			\
 				${PLAT_PATH}/bl31_versal_net_setup.c		\
 				${PLAT_PATH}/plat_topology.c			\
 				common/fdt_fixup.c				\