arm64: dts: renesas: beacon: Enable SPI

The baseboard routes the SPI to a header which can/will be configured at
either the kit level or using device tree overlays.  Because the baseboard
be supporting more than one kit, enable at the baseboard level rather
than a bunch of duplicates later.
Signed-off-by: Adam Ford <aford173@gmail.com>
Link: https://lore.kernel.org/r/20201213183759.223246-14-aford173@gmail.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi

@@ -478,6 +478,13 @@ lvds0_out: endpoint {
 	};
 };
 
+&msiof1 {
+	pinctrl-0 = <&msiof1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+	cs-gpios = <&gpio3 10 GPIO_ACTIVE_LOW>;
+};
+
 &ohci0 {
 	dr_mode = "otg";
 	status = "okay";
@@ -531,6 +538,11 @@ led_pins: leds {
 		bias-pull-down;
 	};
 
+	msiof1_pins: msiof1 {
+		groups = "msiof1_clk_g", "msiof1_rxd_g", "msiof1_txd_g";
+		function = "msiof1";
+	};
+
 	pwm0_pins: pwm0 {
 		groups = "pwm0";
 		function = "pwm0";