brcmfmac: fix spelling mistake "Retreiving" -> "Retrieving"

Trivial fix to spelling mistake in brcmf_err error message.

Signed-off-by: Colin Ian King <[e-mail]>
Acked-by: Arend van Spriel <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>

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

···
 	err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr,
 				       sizeof(ifp->mac_addr));
 	if (err < 0) {
-		brcmf_err("Retreiving cur_etheraddr failed, %d\n", err);
+		brcmf_err("Retrieving cur_etheraddr failed, %d\n", err);
 		goto done;
 	}
 	memcpy(ifp->drvr->wiphy->perm_addr, ifp->drvr->mac, ETH_ALEN);
···
 	strcpy(buf, "ver");
 	err = brcmf_fil_iovar_data_get(ifp, "ver", buf, sizeof(buf));
 	if (err < 0) {
-		brcmf_err("Retreiving version information failed, %d\n",
+		brcmf_err("Retrieving version information failed, %d\n",
 			  err);
 		goto done;
 	}