staging: wilc1000: rename variables prefix using datatype 'u8'

Rename variables with datatype 'u8' in their name to follow the linux
coding style.

Renamed following variables:
u8abort_running_scan
pu8Buffer
pu8keybuf
pu8msa
u8remain_on_chan_flag

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>