cnss2: Fix kernel checkpatch issues

Fix the checkpatch issues which are found during migrating to
msm-4.4 and msm-next kernels. This can keep the driver code
base in sync among different kernels.

Change-Id: I8f6b2a4cd5c6513991ef99eb824dfea53ef9d4dd
Signed-off-by: Yue Ma <yuem@codeaurora.org>