i2c: rcar_i2c: Add R-Car Gen4 support

Add support for R-Car Gen4 SoCs into the driver.

While I2C on R-Car Gen4 does support some extra features (Slave Clock
Stretch Select), for now it is treated the same as I2C on R-Car Gen3,
which let us share the same driver.

Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org> # Use RCAR_64 Kconfig
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/rcar_i2c.c b/drivers/i2c/rcar_i2c.c
index d9ece5e..ff9a2d8 100644
--- a/drivers/i2c/rcar_i2c.c
+++ b/drivers/i2c/rcar_i2c.c
@@ -369,6 +369,7 @@
 static const struct udevice_id rcar_i2c_ids[] = {
 	{ .compatible = "renesas,rcar-gen2-i2c", .data = RCAR_I2C_TYPE_GEN2 },
 	{ .compatible = "renesas,rcar-gen3-i2c", .data = RCAR_I2C_TYPE_GEN3 },
+	{ .compatible = "renesas,rcar-gen4-i2c", .data = RCAR_I2C_TYPE_GEN3 },
 	{ }
 };