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>

Documentation/sound/alsa/ALSA-Configuration.txt

@@ -754,7 +754,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     single_cmd  - Use single immediate commands to communicate with
 		codecs (for debugging only)
     enable_msi	- Enable Message Signaled Interrupt (MSI) (default = off)
-    power_save	- Automatic power-saving timtout (in second, 0 =
+    power_save	- Automatic power-saving timeout (in second, 0 =
 		disable)
     power_save_controller - Reset HD-audio controller in power-saving mode
 		(default = on)

Documentation/sound/alsa/HD-Audio.txt

@@ -16,7 +16,7 @@ methods for the	HD-audio hardware.
 The HD-audio component consists of two parts: the controller chip and 
 the codec chips on the HD-audio bus.  Linux provides a single driver
 for all controllers, snd-hda-intel.  Although the driver name contains
-a word of a well-known harware vendor, it's not specific to it but for
+a word of a well-known hardware vendor, it's not specific to it but for
 all controller chips by other companies.  Since the HD-audio
 controllers are supposed to be compatible, the single snd-hda-driver
 should work in most cases.  But, not surprisingly, there are known

Documentation/sound/alsa/hda_codec.txt

@@ -114,7 +114,7 @@ For writing a sequence of verbs, use snd_hda_sequence_write().
 
 There are variants of cached read/write, snd_hda_codec_write_cache(),
 snd_hda_sequence_write_cache().  These are used for recording the
-register states for the power-mangement resume.  When no PM is needed,
+register states for the power-management resume.  When no PM is needed,
 these are equivalent with non-cached version.
 
 To retrieve the number of sub nodes connected to the given node, use