staging: rtl8188eu: hal: Drop Useless Initialization

Removed initialisation of a varible if it is immediately reassigned.
Changes were made using Coccinelle.
@bad@
identifier i;
position p;
@@

i =@p <+...i...+>;

@@
type T;
constant C;
expression e;
identifier i;
position p != bad.p;
@@
T i
- = C
;
i =@p e;

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>