feat(versal-net): add SMP support for Versal NET

Add SMP support for Versal NET via register access.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Akshay Belsare <Akshay.Belsare@amd.com>
Change-Id: I46d73e2cd678ae720b5255722b6b0611c22659e8
diff --git a/plat/xilinx/versal_net/platform.mk b/plat/xilinx/versal_net/platform.mk
index 5ff5b62..32594c7 100644
--- a/plat/xilinx/versal_net/platform.mk
+++ b/plat/xilinx/versal_net/platform.mk
@@ -46,7 +46,8 @@
 
 PLAT_INCLUDES		:=	-Iinclude/plat/arm/common/			\
 				-Iplat/xilinx/common/include/			\
-				-I${PLAT_PATH}/include/
+				-I${PLAT_PATH}/include/				\
+				-Iplat/xilinx/versal/pm_service/
 
 # Include GICv3 driver files
 include drivers/arm/gic/v3/gicv3.mk