mwifiex: remove unnecessary rx_q lock

SKB lists have their own lock. So this lock is not needed.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --cc drivers/net/wireless/mwifiex/init.c
Simple merge

diff --cc drivers/net/wireless/mwifiex/main.h
Simple merge

diff --cc drivers/net/wireless/mwifiex/pcie.c
Simple merge

diff --cc drivers/net/wireless/mwifiex/sdio.c
Simple merge