staging: rtl8192u: fix spaces in r8192U_hw.h

Fixed "please, no space before tabs" checkpatch warning.

Signed-off-by: Manikishan Ghantasala <manikishanghantasala@gmail.com>
Link: https://lore.kernel.org/r/20210602193334.11687-4-manikishanghantasala@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>