Fixes for 1. fixes for comments recieved on alsa-devel

2. cosmetic edits
	s/period/fragment
	corrected comments
	fixed parameters and descriptors
3. More cosmetic edits and checkpatch fixes

Squash the commits

Change-Id: I6c849673d58e8c8314c0d1e48f55c7660dcca54c
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>