src/cpu: Add required space before opening parenthesis '('

Change-Id: I7fb9bfcaeec0b9dfd0695d2b2d398fd01091f6bc
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16286
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Omar Pakker

src/cpu/x86/lapic/apic_timer.c

@@ -116,7 +116,7 @@ void udelay(u32 usecs)
 	start = lapic_read(LAPIC_TMCCT);
 	do {
 		value = lapic_read(LAPIC_TMCCT);
-	} while((start - value) < ticks);
+	} while ((start - value) < ticks);
 }
 
 #if CONFIG_LAPIC_MONOTONIC_TIMER && !defined(__PRE_RAM__)