Staging: rtl8192e: Remove unneeded brackets.

These were detected with this Coccinelle script:
@@
identifier f1, f2, f3;
constant c;
@@

f1 =
(
- (f2 << f3)
+ f2 << f3
|
- (f2 >> f3)
+ f2 >> f3
|
- (f2 << c)
+ f2 << c
|
- (f2 >> c)
+ f2 >> c
)

Signed-off-by: Vatika Harlalka <vatikaharlalka@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>