fix(versal): resolve the misra 4.6 warnings

MISRA Violation: MISRA-C:2012 R.4.6
- Using basic numerical type int rather than a typedef
that includes size and signedness information.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: I4eccce7e238f283348a5013e2e45c91435b4ae4e
diff --git a/plat/xilinx/versal/plat_versal.c b/plat/xilinx/versal/plat_versal.c
index 54c35b6..132c7b7 100644
--- a/plat/xilinx/versal/plat_versal.c
+++ b/plat/xilinx/versal/plat_versal.c
@@ -7,7 +7,7 @@
 #include <plat_private.h>
 #include <plat/common/platform.h>
 
-int plat_core_pos_by_mpidr(u_register_t mpidr)
+int32_t plat_core_pos_by_mpidr(u_register_t mpidr)
 {
 	if ((mpidr & MPIDR_CLUSTER_MASK) != 0U) {
 		return -1;
@@ -17,5 +17,5 @@
 		return -1;
 	}
 
-	return (int)versal_calc_core_pos(mpidr);
+	return (int32_t)versal_calc_core_pos(mpidr);
 }