dt-bindings: usb: amlogic, meson-g12a-usb-ctrl: fix clock names

dwc2 bindings require clock-names to be "otg".
Fix the example in amlogic,meson-g12a-usb-ctrl to follow this requirement.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml

@@ -107,7 +107,7 @@ examples:
               reg = <0xff400000 0x40000>;
               interrupts = <31>;
               clocks = <&clkc_usb1>;
-              clock-names = "ddr";
+              clock-names = "otg";
               phys = <&usb2_phy1>;
               dr_mode = "peripheral";
               g-rx-fifo-size = <192>;