cpu/intel/common/fsb.c: Correct code style

lint report warning

Solve the RETURN_VOID

BUG = N/A
TEST = N/A

Change-Id: I3b8088494049b5c3244531a4a77af4153edbdff4
Signed-off-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49970
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/cpu/intel/common/fsb.c

@@ -103,7 +103,6 @@ static void resolve_timebase(void)
 	/* Set some semi-ridiculous defaults. */
 	timer_fsb = 500;
 	timer_tsc = 5000;
-	return;
 }
 
 u32 get_timer_fsb(void)