trivial: Miscellaneous documentation typo fixes

Fix various typos in documentation txts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 25fb8bc..5aceb88 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -676,8 +676,8 @@
 	dma-api/all_errors	This file contains a numeric value. If this
 				value is not equal to zero the debugging code
 				will print a warning for every error it finds
-				into the kernel log. Be carefull with this
-				option. It can easily flood your logs.
+				into the kernel log. Be careful with this
+				option, as it can easily flood your logs.
 
 	dma-api/disabled	This read-only file contains the character 'Y'
 				if the debugging code is disabled. This can