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

drivers/staging/rtl8192u/r8192U_hw.h

@@ -88,7 +88,7 @@ enum _RTL8192Usb_HW {
 #define RX_FIFO_THRESHOLD_MASK (BIT(13) | BIT(14) | BIT(15))
 #define RX_FIFO_THRESHOLD_SHIFT 13
 #define RX_FIFO_THRESHOLD_NONE 7
-#define MAX_RX_DMA_MASK 	(BIT(8) | BIT(9) | BIT(10))
+#define MAX_RX_DMA_MASK	(BIT(8) | BIT(9) | BIT(10))
 #define RCR_MXDMA_OFFSET	8
 #define RCR_FIFO_OFFSET		13
 #define RCR_ONLYERLPKT		BIT(31)			// Early Receiving based on Packet Size.