mwifiex: remove unnecessary mwifiex_dump_station_info() call

An extra call to mwifiex_dump_station_info() routine in get_station
callback function is redundant

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>