brcmfmac: trigger memory dump on SDIO firmware halt message

Attempt to dump dongle memory for debug upon receiving firmware halt
message through dongle to host mail box interrupt.

Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

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

@@ -1072,8 +1072,10 @@ static u32 brcmf_sdio_hostmail(struct brcmf_sdio *bus)
 	bus->sdcnt.f1regdata += 2;
 
 	/* dongle indicates the firmware has halted/crashed */
-	if (hmb_data & HMB_DATA_FWHALT)
+	if (hmb_data & HMB_DATA_FWHALT) {
 		brcmf_err("mailbox indicates firmware halted\n");
+		brcmf_dev_coredump(&sdiod->func1->dev);
+	}
 
 	/* Dongle recomposed rx frames, accept them again */
 	if (hmb_data & HMB_DATA_NAKHANDLED) {