TI AM654 MMC PHY
-------------------

Required properties:
 - compatible: ti,am654-emmc-phy
 - #phy-cells: must be 0
 - reg: PHY registers address offset and size
 - clocks: must be phandle of the clock provider which is the host
	   controller
 - clock-names: must be "mmcclk"
 - ti,otap-del-sel: Output Tap Delay select.
 - ti,trm-icp: DLL trim select.

Example:
			mmc_phy1: mmc_phy@10100 {
				compatible = "ti,am654-mmc-phy";
				reg = <0x10100 0x34>;
				clocks = <&sdhci1>;
				clock-names = "mmcclk";
				#phy-cells = <0>;
				ti,otap-del-sel = <0x2>;
				ti,trm-icp = <0x8>;
				status = "disabled";
			};

Host controller node:

			sdhci1: sdhci@0 {
				compatible = "ti,am654-sdhci-5.1";
				reg = <0x0 0x1000>;
				power-domains = <&k3_pds 48>;
				clocks = <&k3_clks 48 0>, <&k3_clks 48 1>;
				clock-names = "clk_ahb", "clk_xin";
				interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>;
				clock-output-names = "mmc_cardclck";
				#clock-cells = <0>;
				phys=<&mmc_phy1>;
				phy-names = "phy_arasan";
				status = "disabled";
			};
