i2c: meson: fix return codes on error

Change meson_i2c_xfer_msg() to return -EREMOTEIO in case of NACK, as
done by other drivers. Also, don't change the return error in
meson_i2c_xfer().

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>

drivers/i2c/meson_i2c.c

@@ -178,7 +178,7 @@ static int meson_i2c_xfer_msg(struct meson_i2c *i2c, struct i2c_msg *msg,
 
 		if (readl(&i2c->regs->ctrl) & REG_CTRL_ERROR) {
 			debug("meson i2c: error\n");
-			return -ENXIO;
+			return -EREMOTEIO;
 		}
 
 		if ((msg->flags & I2C_M_RD) && i2c->count) {
@@ -200,7 +200,7 @@ static int meson_i2c_xfer(struct udevice *bus, struct i2c_msg *msg,
 	for (i = 0; i < nmsgs; i++) {
 		ret = meson_i2c_xfer_msg(i2c, msg + i, i == nmsgs - 1);
 		if (ret)
-			return -EREMOTEIO;
+			return ret;
 	}
 
 	return 0;