ARM: dts: sun9i: a80-optimus: Enable hardware reset and HS-DDR for eMMC

mmc2 has a special pin for eMMC hardware reset, which is controllable
from the controller. Add the "mmc-cap-hw-reset" property to denote that
this controller supports this function, and the pins are actually used.

Also increase the signal drive strength for mmc2 pins, for HS-DDR mode
support.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun9i-a80-optimus.dts

@@ -174,9 +174,15 @@ &mmc2 {
 	vmmc-supply = <&reg_vcc3v0>;
 	bus-width = <8>;
 	non-removable;
+	cap-mmc-hw-reset;
 	status = "okay";
 };
 
+&mmc2_8bit_pins {
+	/* Increase drive strength for DDR modes */
+	allwinner,drive = <SUN4I_PINCTRL_40_MA>;
+};
+
 &reg_usb1_vbus {
 	pinctrl-0 = <&usb1_vbus_pin_optimus>;
 	gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */