fix(zynqmp): resolve misra R15.7 warnings

MISRA Violation: MISRA-C:2012 R.15.7
- All if . . else if constructs shall be terminated
with an else statement.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: If921ca7c30b2feea6535791aa15f4de7101c3134
diff --git a/plat/xilinx/zynqmp/bl31_zynqmp_setup.c b/plat/xilinx/zynqmp/bl31_zynqmp_setup.c
index 58eee3a..095853f 100644
--- a/plat/xilinx/zynqmp/bl31_zynqmp_setup.c
+++ b/plat/xilinx/zynqmp/bl31_zynqmp_setup.c
@@ -83,6 +83,8 @@
 		if (rc == 0) {
 			panic();
 		}
+	} else {
+		ERROR("BL31: No console device found.\n");
 	}
 	/* Initialize the platform config for future decision making */
 	zynqmp_config_setup();