ASoC: mediatek: Add interrupt-names property in binding text

Add interrupt-names property in DT - if future revisions of the IP
have different sets of interrupts the binding can adapt gracefully.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
CC: Garlic Tseng <garlic.tseng@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/mt2701-afe-pcm.txt

@@ -3,7 +3,8 @@ Mediatek AFE PCM controller for mt2701
 Required properties:
 - compatible = "mediatek,mt2701-audio";
 - reg: register location and size
-- interrupts: Should contain AFE interrupt
+- interrupts: should contain AFE and ASYS interrupts
+- interrupt-names: should be "afe" and "asys"
 - power-domains: should define the power domain
 - clock-names: should have these clock names:
 		"infra_sys_audio_clk",
@@ -59,6 +60,7 @@ Example:
 		      <0 0x112A0000 0 0x20000>;
 		interrupts = <GIC_SPI 104 IRQ_TYPE_LEVEL_LOW>,
 			     <GIC_SPI 132 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names	= "afe", "asys";
 		power-domains = <&scpsys MT2701_POWER_DOMAIN_IFR_MSC>;
 		clocks = <&infracfg CLK_INFRA_AUDIO>,
 			 <&topckgen CLK_TOP_AUD_MUX1_SEL>,