fix(zynqmp): resolve coverity warnings

Fix for coverity issues in pm_service component.
Fixed compilation error for versal platform.

Change-Id: I948f01807e67ad1e41021557e040dcbfb7b3a39e
Signed-off-by: HariBabu Gattem <haribabu.gattem@amd.com>
Signed-off-by: Naman Patel <naman.patel@amd.com>
diff --git a/plat/xilinx/common/include/pm_ipi.h b/plat/xilinx/common/include/pm_ipi.h
index 8a15668..52dfc47 100644
--- a/plat/xilinx/common/include/pm_ipi.h
+++ b/plat/xilinx/common/include/pm_ipi.h
@@ -16,7 +16,7 @@
 #define IPI_BLOCKING		1
 #define IPI_NON_BLOCKING	0
 
-int32_t pm_ipi_init(const struct pm_proc *proc);
+void pm_ipi_init(const struct pm_proc *proc);
 
 enum pm_ret_status pm_ipi_send(const struct pm_proc *proc,
 			       uint32_t payload[PAYLOAD_ARG_CNT]);