fsi: master-ast-cf: fix spelling mistake "firwmare" -> "firmware"

There is a spelling mistake in a dev_err error message. Fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>

drivers/fsi/fsi-master-ast-cf.c

@@ -838,7 +838,7 @@ static int load_copro_firmware(struct fsi_master_acf *master)
 	rc = request_firmware(&fw, FW_FILE_NAME, master->dev);
 	if (rc) {
 		dev_err(
-			master->dev, "Error %d to load firwmare '%s' !\n",
+			master->dev, "Error %d to load firmware '%s' !\n",
 			rc, FW_FILE_NAME);
 		return rc;
 	}