fix(xilinx): fix sending sgi to linux

Currently in Versal NET TF-A writing 32 bits in icc_asgi1r_el1 register
to raise SGI to Linux but this register is of 64 bits. Also its writing
only CPU number and SGI number to this register but along with that it
needs to write cluster number and other information. Which is not happening
currently. So use generic function plat_ic_raise_ns_sgi() to raise SGI to
Linux.

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Change-Id: I6f5146c8315a321b705ed2ef79e2dc927b805ffb
diff --git a/plat/xilinx/common/pm_service/pm_svc_main.c b/plat/xilinx/common/pm_service/pm_svc_main.c
index 9df9eb2..b62b271 100644
--- a/plat/xilinx/common/pm_service/pm_svc_main.c
+++ b/plat/xilinx/common/pm_service/pm_svc_main.c
@@ -45,13 +45,7 @@
 
 static void notify_os(void)
 {
-	int32_t cpu;
-	uint32_t reg;
-
-	cpu = plat_my_core_pos() + 1U;
-
-	reg = (cpu | (sgi << XSCUGIC_SGIR_EL1_INITID_SHIFT));
-	write_icc_asgi1r_el1(reg);
+	plat_ic_raise_ns_sgi(sgi, read_mpidr_el1());
 }
 
 static uint64_t cpu_pwrdwn_req_handler(uint32_t id, uint32_t flags,