ARM: dts: HR2: Fixed iProc PCIe MSI sub-node

Rename the msi controller unit name to 'msi' to avoid collisions with
the 'msi-controller' boolean property.

Signed-off-by: Florian Fainelli <[e-mail]>

arch/arm/boot/dts/bcm-hr2.dtsi

···
 		status = "disabled";
 
 		msi-parent = <&msi0>;
-		msi0: msi-controller {
+		msi0: msi {
 			compatible = "brcm,iproc-msi";
 			msi-controller;
 			interrupt-parent = <&gic>;
···
 		status = "disabled";
 
 		msi-parent = <&msi1>;
-		msi1: msi-controller {
+		msi1: msi {
 			compatible = "brcm,iproc-msi";
 			msi-controller;
 			interrupt-parent = <&gic>;