brcm80211: remove redundant pointer 'address'

Pointer 'address' is being assigned and updated in a few places
by it is never read. Hence the assignments are redundant and can
be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200405133906.381358-1-colin.king@canonical.com

drivers/net/wireless/broadcom/brcm80211/brcmfmac/commonring.c

@@ -180,14 +180,8 @@ brcmf_commonring_reserve_for_write_multiple(struct brcmf_commonring *commonring,
 
 int brcmf_commonring_write_complete(struct brcmf_commonring *commonring)
 {
-	void *address;
-
-	address = commonring->buf_addr;
-	address += (commonring->f_ptr * commonring->item_len);
-	if (commonring->f_ptr > commonring->w_ptr) {
-		address = commonring->buf_addr;
+	if (commonring->f_ptr > commonring->w_ptr)
 		commonring->f_ptr = 0;
-	}
 
 	commonring->f_ptr = commonring->w_ptr;