mediatek: mt7622: linksys-e8450: set driving strength for SPI-NAND

Set 12mA driving strength for SPI-NAND pins like the stock firmware's
bootloader does as well.

Signed-off-by: Daniel Golle <[email protected]>

target/linux/mediatek/dts/mt7622-linksys-e8450.dtsi

@@ -1,8 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0-only OR MIT)
 
 /dts-v1/;
-#include <dt-bindings/input/input.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/pinctrl/mt65xx.h>
 
 #include "mt7622.dtsi"
 #include "mt6380.dtsi"
@@ -271,6 +272,11 @@
 			function = "flash";
 			groups = "snfi";
 		};
+
+		conf {
+			groups = "snfi";
+			drive-strength = <MTK_DRIVE_12mA>;
+		};
 	};
 
 	spic0_pins: spic0-pins {