staging/rtl8188eu : Remove duplicated BIT() definitions The BIT() macro is already defined in bitops.h, remove duplicate definitions. Users of BIT() macro are expecting unsigned int/u32, so add typecasts where this creates a build warning. Signed-off-by: Anish Bhatt <anish@chelsio.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>