mediatek: mt7622: add irq for spi-nor controller

Save some CPU from unnecessary polling and make SPI flash reading
a tiny bit faster.

Signed-off-by: Chuanhong Guo <[email protected]>

target/linux/mediatek/patches-5.15/104-mt7622-add-snor-irq.patch

@@ -0,0 +1,10 @@
+--- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
++++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
+@@ -577,6 +577,7 @@
+ 		compatible = "mediatek,mt7622-nor",
+ 			     "mediatek,mt8173-nor";
+ 		reg = <0 0x11014000 0 0xe0>;
++		interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_LOW>;
+ 		clocks = <&pericfg CLK_PERI_FLASH_PD>,
+ 			 <&topckgen CLK_TOP_FLASH_SEL>;
+ 		clock-names = "spi", "sf";