arm: dts: vf6: fix DTC unit warnings

Fix following warnings for all vf6 based boards:

Warning (unit_address_vs_reg): Node /soc/ifc at 1530000/board-control at 3,0/mdio-mux-emi1 has a reg or ranges property, but no unit name Warning (unit_address_vs_reg): Node /soc/aips-bus at 40000000 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/aips-bus at 40080000 has a unit name, but no reg property

Signed-off-by Heiko Schocher <[email protected]>

---
This warnings pop up with the DTC compiler:

$ /tmp/dtc/dtc -v
Version: DTC 1.4.1-gbeef80b8

This fixes the compile warnings for:
https://travis-ci.org/u-boot/u-boot/jobs/122880431

see:
https://travis-ci.org/hsdenx/u-boot/jobs/123238780

Changes in v2:
- added comment from bhuvanchandra.dv at toradex.com :
used the changes Stefan Agner posted o LKML:

   https://lkml.org/lkml/2016/4/2/11

  arch/arm/dts/ls1021a-qds.dtsi | 2 +-
  arch/arm/dts/vf.dtsi          | 2 ++
  2 files changed, 3 insertions(+), 1 deletion(-)

arch/arm/dts/ls1021a-qds.dtsi +1 -1

index ca9e835..4cb6337 100644
@@ -138,7 +138,7 @@
  		device-width = <1>;
  		ranges = <0 3 0 0x100>;
 
-		mdio-mux-emi1 {
+		mdio-mux-emi1 at 54 {
  			compatible = "mdio-mux-mmioreg";
  			mdio-parent-bus = <&mdio0>;
  			#address-cells = <1>;

arch/arm/dts/vf.dtsi +2 -0

index 1530d2f..c10c564 100644
@@ -32,6 +32,7 @@
  			compatible = "fsl,aips-bus", "simple-bus";
  			#address-cells = <1>;
  			#size-cells = <1>;
+			reg = <0x40000000 0x00070000>;
  			ranges;
 
  			uart0: serial at 40027000 {

@@ -119,6 +120,7 @@
  			compatible = "fsl,aips-bus", "simple-bus";
  			#address-cells = <1>;
  			#size-cells = <1>;
+			reg = <0x40080000 0x0007f000>;
  			ranges;
 
  			uart4: serial at 400a9000 {