ARM: */timer.c: fix spelling and vertical alignment

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/arch/arm/cpu/arm1136/mx31/timer.c b/arch/arm/cpu/arm1136/mx31/timer.c
index 7972ba0..b8848c4 100644
--- a/arch/arm/cpu/arm1136/mx31/timer.c
+++ b/arch/arm/cpu/arm1136/mx31/timer.c
@@ -151,7 +151,7 @@
 	timestamp = time_to_tick(t);
 }
 
-/* delay x useconds AND perserve advance timstamp value */
+/* delay x useconds AND preserve advance timestamp value */
 void __udelay (unsigned long usec)
 {
 	unsigned long long tmp;