Fix typos in Documentation/: 'H'-'M'

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'H'-'M'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/sched-coding.txt b/Documentation/sched-coding.txt
index 2b75ef67..cbd8db7 100644
--- a/Documentation/sched-coding.txt
+++ b/Documentation/sched-coding.txt
@@ -15,7 +15,7 @@
 void load_balance(runqueue_t *this_rq, int idle)
 	Attempts to pull tasks from one cpu to another to balance cpu usage,
 	if needed.  This method is called explicitly if the runqueues are
-	inbalanced or periodically by the timer tick.  Prior to calling,
+	imbalanced or periodically by the timer tick.  Prior to calling,
 	the current runqueue must be locked and interrupts disabled.
 
 void schedule()