staging: wilc1000: added comments for 'hif_cs' mutex lock

Added comments for 'hif_cs' mutex to avoid checkpatch.pl reported
issues.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed