staging: wilc1000: linux_wlan: remove unused defines

This patch removes unused defines from linux_wlan.c file.
 - NM73131
 - PLAT_CLM9722
Two defines are support custom feature that don't used anymore.

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>