dt-bindings: imx-ocotp: add compatible string for i.MX7D/S

Add compatible string for i.MX7D/S
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/nvmem/imx-ocotp.txt

@@ -9,6 +9,7 @@ Required properties:
 	"fsl,imx6sl-ocotp" (i.MX6SL), or
 	"fsl,imx6sx-ocotp" (i.MX6SX),
 	"fsl,imx6ul-ocotp" (i.MX6UL),
+	"fsl,imx7d-ocotp" (i.MX7D/S),
 	followed by "syscon".
 - reg: Should contain the register base and length.
 - clocks: Should contain a phandle pointing to the gated peripheral clock.