staging: rtl8188eu: Do not byteswap half initialized variable

Copying 16 bits into an uninitialized 32 bit stack variable and then
byteswapping it can provide 'interesting' results.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>