staging: gdm72xx: Removed unnecesarry out of memory usage

WARNING: Possible unnecessary out of memory usage
checkpatch.pl warning in gdm_wimax.c

Signed-off-by: Sarah Khan <sarahjmi07@gmail.com>
Acked-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>