mwifiex: limit channel number not to overflow memory
mwifiex: limit channel number not to overflow memory

Limit the channel number in scan request, or the driver scan
config structure memory will be overflowed.

Cc: <4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org> # 3.5+
Signed-off-by: Stone Piao <83e63311b6883760407ad61b4a2e215f0d5ec9ff@marvell.com>
Signed-off-by: Bing Zhao <abbaae6378dda6b8d65fe6bd0f8beb334a5e4c4f@marvell.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas