staging: rtl8188eu: Remove 'dma_addr_t dma_transfer_addr' from struct recv_buf

Remove unused variable dma_transfer_addr.
Signed-off-by: Nnavin patidar <navin.patidar@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/rtw_recv.h

@@ -245,7 +245,6 @@ struct recv_buf {
 	u8	*ptail;
 	u8	*pend;
 	struct urb *purb;
-	dma_addr_t dma_transfer_addr;	/* (in) dma addr for transfer_buffer */
 	u32 alloc_sz;
 	u8  irp_pending;
 	int  transfer_len;