fix(versal): typecast expressions to match data type

This corrects the MISRA violation C2012-10.4:
Both operands of an operator in which the usual arithmetic
conversions are performed shall have the same essential type
category.
The condition is explicitly checked against 0U, appending 'U' and
typecasting for unsigned comparison.

Change-Id: Ide520aa8ec900d0e23e80753d7082e34b6897e8f
Signed-off-by: Maheedhar Bollapalli <maheedharsai.bollapalli@amd.com>
diff --git a/plat/xilinx/versal/plat_psci.c b/plat/xilinx/versal/plat_psci.c
index 3fc6dbd..f160563 100644
--- a/plat/xilinx/versal/plat_psci.c
+++ b/plat/xilinx/versal/plat_psci.c
@@ -222,7 +222,7 @@
 	 * be set.
 	 */
 	ret = pm_feature_check((uint32_t)PM_SELF_SUSPEND, &version_type[0], SECURE_FLAG);
-	if (ret == PM_RET_SUCCESS) {
+	if (ret == (uint32_t)PM_RET_SUCCESS) {
 		fw_api_version = version_type[0] & 0xFFFFU;
 		if (fw_api_version >= 3U) {
 			(void)pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_OFF, 0,