staging: wilc1000: rename Bssid1 of function get_if_handler

This patch renames Bssid1 of function get_if_handler to bssid1
to avoid CamelCase naming convention.

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>