i2c: mediatek: speeds is replaced by macros definitions

Different speeds have been defined by macros,
so we use macros definitions.
Signed-off-by: qii wang <qii.wang@mediatek.com>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-mt65xx.c

@@ -456,7 +456,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	control_reg = readw(i2c->base + OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
-	if ((i2c->speed_hz > 400000) || (left_num >= 1))
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
 
 	if (i2c->op == I2C_MASTER_WRRD)
@@ -465,7 +465,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	writew(control_reg, i2c->base + OFFSET_CONTROL);
 
 	/* set start condition */
-	if (i2c->speed_hz <= 100000)
+	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
 		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
 	else
 		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);