Staging: rtl8192e: fix an endian bug

Passing the high bits of "ratr_value" to rtl8192_config_rate() only
works on little endian systems.  We should be passing a u16 value.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>