brcmfmac: increase message buffer size for control packets

In wifi firmware, max length of IOCTL/IOVAR buffer size is 8192.
Increase the message buffer max size same as wifi firmware for control
packets so return buffers can come back.
Signed-off-by: Soontak Lee <soontak.lee@cypress.com>
Signed-off-by: Jia-Shyr Chuang <joseph.chuang@cypress.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200610152106.175257-3-chi-hsien.lin@cypress.com

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

@@ -54,6 +54,7 @@
 #define BRCMF_IOCTL_REQ_PKTID			0xFFFE
 
 #define BRCMF_MSGBUF_MAX_PKT_SIZE		2048
+#define BRCMF_MSGBUF_MAX_CTL_PKT_SIZE           8192
 #define BRCMF_MSGBUF_RXBUFPOST_THRESHOLD	32
 #define BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST	8
 #define BRCMF_MSGBUF_MAX_EVENTBUF_POST		8
@@ -1028,7 +1029,7 @@ brcmf_msgbuf_rxbuf_ctrl_post(struct brcmf_msgbuf *msgbuf, bool event_buf,
 		rx_bufpost = (struct msgbuf_rx_ioctl_resp_or_event *)ret_ptr;
 		memset(rx_bufpost, 0, sizeof(*rx_bufpost));
 
-		skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
+		skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_CTL_PKT_SIZE);
 
 		if (skb == NULL) {
 			bphy_err(drvr, "Failed to alloc SKB\n");