fix(zynqmp): resolve misra R15.6 warnings

MISRA Violation: MISRA-C:2012 R.15.6
- The body of an iteration-statement or a selection-statement shall be
  a compound statement.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: I0fc8eeac0e592f00297a1ac42a1ba3df1144733b
diff --git a/plat/xilinx/common/ipi.c b/plat/xilinx/common/ipi.c
index 0b8020b..453e0b5 100644
--- a/plat/xilinx/common/ipi.c
+++ b/plat/xilinx/common/ipi.c
@@ -69,8 +69,9 @@
 {
 	int ret = 1;
 
-	if (remote >= ipi_total || local >= ipi_total)
+	if (remote >= ipi_total || local >= ipi_total) {
 		ret = 0;
+	}
 
 	return ret;
 }
@@ -88,12 +89,13 @@
 {
 	int ret = 0;
 
-	if (!is_ipi_mb_within_range(local, remote))
+	if (!is_ipi_mb_within_range(local, remote)) {
 		ret = -EINVAL;
-	else if (IPI_IS_SECURE(local) && !is_secure)
+	} else if (IPI_IS_SECURE(local) && !is_secure) {
 		ret = -EPERM;
-	else if (IPI_IS_SECURE(remote) && !is_secure)
+	} else if (IPI_IS_SECURE(remote) && !is_secure) {
 		ret = -EPERM;
+	}
 
 	return ret;
 }
@@ -141,11 +143,13 @@
 	uint32_t status;
 
 	status = mmio_read_32(IPI_REG_BASE(local) + IPI_OBR_OFFSET);
-	if (status & IPI_BIT_MASK(remote))
+	if (status & IPI_BIT_MASK(remote)) {
 		ret |= IPI_MB_STATUS_SEND_PENDING;
+	}
 	status = mmio_read_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET);
-	if (status & IPI_BIT_MASK(remote))
+	if (status & IPI_BIT_MASK(remote)) {
 		ret |= IPI_MB_STATUS_RECV_PENDING;
+	}
 
 	return ret;
 }