fix(bl31): add missing curly braces

This corrects the MISRA violation C2012-15.6:
The body of an iteration-statement or a selection-statement shall
be a compound-statement.
Enclosed statement body within the curly braces.

Change-Id: I7c1474a2aa5c940433b88be75c88b4ffa5833b57
Signed-off-by: Nithin G <nithing@amd.com>
Signed-off-by: Maheedhar Bollapalli <maheedharsai.bollapalli@amd.com>
diff --git a/bl31/interrupt_mgmt.c b/bl31/interrupt_mgmt.c
index a2b2c06..1a1cbc4 100644
--- a/bl31/interrupt_mgmt.c
+++ b/bl31/interrupt_mgmt.c
@@ -219,9 +219,9 @@
  ******************************************************************************/
 interrupt_type_handler_t get_interrupt_type_handler(uint32_t type)
 {
-	if (validate_interrupt_type(type) != 0)
+	if (validate_interrupt_type(type) != 0) {
 		return NULL;
-
+	}
 	return intr_type_descs[type].handler;
 }