arm64: dts: renesas: r8a779a0: Add missing hypervisor virtual timer IRQ

Add the missing fifth interrupt to the device node that represents the
ARM architected timer.  While at it, add an interrupt-names property for
clarity,

Fixes: 834c310f ("arm64: dts: renesas: Add Renesas R8A779A0 SoC support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/671416fb31e3992101c32fe7e46147fe4cd623ae.1718890849.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a779a0.dtsi

@@ -2919,6 +2919,9 @@ timer {
 		interrupts-extended = <&gic GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
 				      <&gic GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
 				      <&gic GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
-				      <&gic GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
+				      <&gic GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>,
+				      <&gic GIC_PPI 12 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names = "sec-phys", "phys", "virt", "hyp-phys",
+				  "hyp-virt";
 	};
 };