mfd: printk/comment fixes

Correct spelling typo in drivers/mfd

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index b86fd8e..f4a43de 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -342,7 +342,7 @@
 
 		 /*
 		  * Delay might be needed for ABB8500 cut 3.0, if not, remove
-		  * when hardware will be availible
+		  * when hardware will be available
 		  */
 			msleep(1);
 			break;