dt-bindings: phy: Fix errors in intel,lgm-emmc-phy example

DT labels can't have '-' in them causing a compile failure in the example. Fixing that leads to more warnings:

Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dts:23.13-33: Warning (reg_format): /example-0/chiptop@e0200000/emmc-phy@a8:reg: property has invalid length (8 bytes) (#address-cells == 2, #size-cells == 1) Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dt.yaml: Warning (pci_device_bus_num): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dt.yaml: Warning (i2c_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dt.yaml: Warning (spi_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dts:21.33-26.13: Warning (avoid_default_addr_size): /example-0/chiptop@e0200000/emmc-phy@a8: Relying on default #address-cells value Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dts:21.33-26.13: Warning (avoid_default_addr_size): /example-0/chiptop@e0200000/emmc-phy@a8: Relying on default #size-cells value

---
I will apply this to the DT tree for -rc1.

 Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index ff7959c21af0..0ccee64c6962 100644
@@ -45,8 +45,10 @@ examples:
     sysconf: chiptop@e0200000 {
       compatible = "intel,lgm-syscon", "syscon";
       reg = <0xe0200000 0x100>;
+      #address-cells = <1>;
+      #size-cells = <1>;
 
-      emmc-phy: emmc-phy@a8 {
+      emmc_phy: emmc-phy@a8 {
         compatible = "intel,lgm-emmc-phy";
         reg = <0x00a8 0x10>;
         clocks = <&emmc>;

2.20.1