src: Add missing 'void' in function definition

Change-Id: I7fa1f9402b177a036f08bf99c98a6191c35fa0b5
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61371
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/device/oprom/yabel/pmm.c

@@ -104,7 +104,7 @@ u8 pmm_setup(u16 segment, u16 offset)
 /* handle the selfdefined interrupt, this is executed, when the PMM Entry Point
  * is executed, it must handle all PMM requests
  */
-void pmm_handleInt()
+void pmm_handleInt(void)
 {
 	u32 rval = 0;
 	u16 function, flags;