mwifiex: add support for P2P GO in interface type change

When cfg80211 calls to change interface type for P2P GO, send
P2P mode config commands to firmware and set bss role and bss
mode accordingly.

Signed-off-by: Stone Piao <piaoyun@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>