arm64: dts: models: use list instead of tuple for mmci interrupts

RTSM/FVP vexpress motherboard model MMCI requires dedicated interrupts
for CMD and PIO, which obviously should be expressed as a list. Current
form uses tuple and it works fine since interrupt-cells equal to 1.
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Reported-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi

@@ -86,7 +86,7 @@ aaci@40000 {
 				mmci@50000 {
 					compatible = "arm,pl180", "arm,primecell";
 					reg = <0x050000 0x1000>;
-					interrupts = <9 10>;
+					interrupts = <9>, <10>;
 					cd-gpios = <&v2m_sysreg 0 0>;
 					wp-gpios = <&v2m_sysreg 1 0>;
 					max-frequency = <12000000>;