staging: rtl8723bs: tidy up error handling

The check for if rtw_skb_alloc() fails is done twice and is written
in a confusing way. Move the "if (!recvbuf->pskb)" right after
the allocation. The "if (recvbuf->pskb)" check can now be deleted
and the code pulled in one tab.

Suggested-by: Dan Carpenter <[e-mail]>
Reviewed-by: Dan Carpenter <[e-mail]>
Signed-off-by: Yihao Han <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8723bs/hal/sdio_ops.c

···
 		SIZE_PTR alignment = 0;
 
 		recvbuf->pskb = rtw_skb_alloc(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
-
-		if (recvbuf->pskb) {
-			recvbuf->pskb->dev = adapter->pnetdev;
-
-			tmpaddr = (SIZE_PTR)recvbuf->pskb->data;
-			alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
-			skb_reserve(recvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));
-		}
-
 		if (!recvbuf->pskb)
 			return NULL;
+
+		recvbuf->pskb->dev = adapter->pnetdev;
+
+		tmpaddr = (SIZE_PTR)recvbuf->pskb->data;
+		alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
+		skb_reserve(recvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));
 	}
 
 	/* 3 3. read data from rxfifo */