dt-bindings: mmc: brcm,sdhci-brcmstb: Add support for 7216b0

- compatible: should be one of the following

  - "brcm,bcm7425-sdhci"

  - "brcm,bcm7445-sdhci"

  - "brcm,bcm7216-sdhci"

Refer to clocks/clock-bindings.txt for generic clock consumer properties.

Example:

	sdhci@f03e0100 {

		compatible = "brcm,bcm7425-sdhci";

		reg = <0xf03e0000 0x100>;

		interrupts = <0x0 0x26 0x0>;

		sdhci,auto-cmd12;

		clocks = <&sw_sdio>;

	sdhci@84b0000 {

		sd-uhs-sdr50;

		sd-uhs-ddr50;

		sd-uhs-sdr104;

		sdhci,auto-cmd12;

		compatible = "brcm,bcm7216-sdhci",

			   "brcm,bcm7445-sdhci",

			   "brcm,sdhci-brcmstb";

		reg = <0x84b0000 0x260 0x84b0300 0x200>;

		reg-names = "host", "cfg";

		interrupts = <0x0 0x26 0x4>;

		interrupt-names = "sdio0_0";

		clocks = <&scmi_clk 245>;

		clock-names = "sw_sdio";

	};

	sdhci@f03e0300 {

	sdhci@84b1000 {

		mmc-ddr-1_8v;

		mmc-hs200-1_8v;

		mmc-hs400-1_8v;

		mmc-hs400-enhanced-strobe;

		supports-cqe;

		non-removable;

		bus-width = <0x8>;

		compatible = "brcm,bcm7425-sdhci";

		reg = <0xf03e0200 0x100>;

		interrupts = <0x0 0x27 0x0>;

		sdhci,auto-cmd12;

		clocks = <sw_sdio>;

		mmc-hs200-1_8v;

		compatible = "brcm,bcm7216-sdhci",

			   "brcm,bcm7445-sdhci",

			   "brcm,sdhci-brcmstb";

		reg = <0x84b1000 0x260 0x84b1300 0x200>;

		reg-names = "host", "cfg";

		interrupts = <0x0 0x27 0x4>;

		interrupt-names = "sdio1_0";

		clocks = <&scmi_clk 245>;

		clock-names = "sw_sdio";

	};