staging: rtl8188eu: Remove double test

Removed the duplicate test on memcmp(pIE->data, BROADCOM_OUI2, 3).

The semantic that find this problem is
// <smpl>
@@
expression E;
@@

(
* E
  || ... || E
|
* E
  && ... && E
)
// </smpl>

Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>