refactor(xilinx): move versal files to common place

Moved necessary files to common place so that it can be used for
Versal NET.

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Change-Id: I611fa849207b082e6599acfb65c55d27b9c99435
diff --git a/plat/xilinx/zynqmp/libpm.mk b/plat/xilinx/zynqmp/libpm.mk
index 4ceb576..db3c742 100644
--- a/plat/xilinx/zynqmp/libpm.mk
+++ b/plat/xilinx/zynqmp/libpm.mk
@@ -8,8 +8,8 @@
 			pm_ipi.c)
 
 LIBPM_SRCS      +=      $(addprefix plat/xilinx/zynqmp/pm_service/,  \
-                        pm_svc_main.c 					\
-			pm_api_sys.c					\
+                        zynqmp_pm_svc_main.c 				\
+			zynqmp_pm_api_sys.c				\
 			pm_api_pinctrl.c				\
 			pm_api_ioctl.c					\
 			pm_api_clock.c					\