Fix some typos in Documentation/: 'A'

This patch fixes typos in various Documentation txts.
This patch addresses some words starting with the letter 'A'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 137e993..aa21c66 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -355,9 +355,9 @@
 
 	clock=		[BUGS=IA-32, HW] gettimeofday clocksource override.
 			[Deprecated]
-			Forces specified clocksource (if avaliable) to be used
+			Forces specified clocksource (if available) to be used
 			when calculating gettimeofday(). If specified
-			clocksource is not avalible, it defaults to PIT.
+			clocksource is not available, it defaults to PIT.
 			Format: { pit | tsc | cyclone | pmtmr }
 
 	disable_8254_timer