mediatek: filogic: bpi-r3-mini: fix power on M.2 slot

One of the pins requiered by M.2 slot is conflict with spi1,
however, spi1 seems unused so simply disable it for now, this
matches the factory behavior [1].

1. https://github.com/BPI-SINOVOIP/BPI-R3MINI-OPENWRT-V21.02.3/commit/9bd78779f267a21c04c5bb4d16c32e83aae8d1d3

Signed-off-by: Tianling Shen <[email protected]>

target/linux/mediatek/dts/mt7986a-bananapi-bpi-r3-mini.dts

@@ -427,6 +427,11 @@
 	};
 
 	usb_ngff_pins: usb-ngff-pins {
+		ngff-gnss-off {
+			pins = "GPIO_6";
+			drive-strength = <8>;
+			mediatek,pull-up-adv = <1>;
+		};
 		ngff-pe-rst {
 			pins = "GPIO_7";
 			drive-strength = <8>;
@@ -447,6 +452,11 @@
 			drive-strength = <8>;
 			mediatek,pull-up-adv = <1>;
 		};
+		ngff-coex {
+			pins = "SPI1_CS";
+			drive-strength = <8>;
+			mediatek,pull-up-adv = <1>;
+		};
 	};
 
 	wf_2g_5g_pins: wf-2g-5g-pins {
@@ -534,7 +544,8 @@
 &spi1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&spic_pins>;
-	status = "okay";
+	/* conflicts with M.2 pin */
+	status = "disabled";
 };
 
 &ssusb {