staging: wilc1000: rename pBSSID of function linux_wlan_set_bssid

This patch renames pBSSID of function linux_wlan_set_bssid to bssid
to avoid CamelCase naming convention.
Also, prototype linux_wlan_set_bssid in wilc_wfi_cfgoperations.c is moved to
wilc_wfi_netdevice.h.

Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>