cpu/x86: Wrap lines at 80 columns

Fix the following warning detected by checkpatch.pl:

WARNING: line over 80 characters

TEST=Build and run on Galileo Gen2

Change-Id: I56ea28826963403dc0719f40c13782c56dc97feb
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18844
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/cpu/x86/lapic/apic_timer.c

@@ -127,7 +127,8 @@ void udelay(u32 usecs)
 		timer_fsb = get_timer_fsb();
 	}
 
-	/* Calculate the number of ticks to run, our FSB runs at timer_fsb Mhz */
+	/* Calculate the number of ticks to run, our FSB runs at timer_fsb Mhz
+	 */
 	ticks = usecs * timer_fsb;
 	start = lapic_read(LAPIC_TMCCT);
 	do {