staging: r8188eu: remove unused members of struct xmit_buf

Remove unused members of struct xmit_buf: alloc_sz, ff_hwaddr,
dma_transfer_addr, bpending and last.

Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Link: https://lore.kernel.org/r/20200712123821.553420-1-insafonov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/rtw_xmit.h

@@ -193,14 +193,9 @@ struct xmit_buf {
 	void *priv_data;
 	u16 ext_tag; /*  0: Normal xmitbuf, 1: extension xmitbuf. */
 	u16 flags;
-	u32 alloc_sz;
 	u32  len;
 	struct submit_ctx *sctx;
-	u32	ff_hwaddr;
 	struct urb *pxmit_urb[8];
-	dma_addr_t dma_transfer_addr;	/* (in) dma addr for transfer_buffer */
-	u8 bpending[8];
-	int last[8];
 };
 
 struct xmit_frame {

drivers/staging/rtl8188eu/os_dep/xmit_linux.c

@@ -23,7 +23,6 @@ int rtw_os_xmit_resource_alloc(struct xmit_buf *pxmitbuf, u32 alloc_sz)
 		return _FAIL;
 
 	pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);
-	pxmitbuf->dma_transfer_addr = 0;
 
 	for (i = 0; i < 8; i++) {
 		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);