Documentation/sound/alsa/ fix a typo

Corrected the word avarage to average in the file compress_offload.txt.
Signed-off-by: NStefan Huber <steffhip@gmail.com>
Signed-off-by: NMatthias Schid <aircrach115@gmail.com>
Signed-off-by: NSimon Puels <simon.puels@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Documentation/sound/alsa/compress_offload.txt

@@ -130,7 +130,7 @@ the settings should remain the exception.
 The timestamp becomes a multiple field structure. It lists the number
 of bytes transferred, the number of samples processed and the number
 of samples rendered/grabbed. All these values can be used to determine
-the avarage bitrate, figure out if the ring buffer needs to be
+the average bitrate, figure out if the ring buffer needs to be
 refilled or the delay due to decoding/encoding/io on the DSP.
 
 Note that the list of codecs/profiles/modes was derived from the