mwifiex: use common keyinfo bitmap for different key types

Instead of having separate key information definitions for
each type of key, a common key information bitmap is used.

Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>