ARM: dts: Aspeed: AST2600: Add XDMA PCI-E root control reset

The AST2600 XDMA engine requires the PCI-E root control reset be cleared
as well, so add a phandle to that syscon reset.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-g6.dtsi

@@ -343,7 +343,8 @@ xdma: xdma@1e6e7000 {
 				compatible = "aspeed,ast2600-xdma";
 				reg = <0x1e6e7000 0x100>;
 				clocks = <&syscon ASPEED_CLK_GATE_BCLK>;
-				resets = <&syscon ASPEED_RESET_DEV_XDMA>;
+				resets = <&syscon ASPEED_RESET_DEV_XDMA>, <&syscon ASPEED_RESET_RC_XDMA>;
+				reset-names = "device", "root-complex";
 				interrupts-extended = <&gic GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
 						      <&scu_ic0 2>;
 				pcie-device = "bmc";