staging: wlan-ng: prism2fw.c: Fix "Possible unnecessary 'out of memory'...

staging: wlan-ng: prism2fw.c: Fix "Possible unnecessary 'out of memory' message" checkpatch.pl warning"

This patch removes unnecessary out of memory warning
message from wlan-ng prism2fw.c file.

Signed-off-by: Prathamesh Deshpande <prathameshdeshpande7@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>