dt-bindings: usb: richtek,rt1711h: Switch ETEK ET7304 to use a fallback compatible

dt-bindings: usb: richtek,rt1711h: Switch ETEK ET7304 to use a fallback compatible

As stated in [1], ETEK ET7304 is identical to Richtek RT1715, except for
the VID value in its registers, so reflect it in the bindings via a
fallback compatible.

As there are various TCPCI chips by different vendors reimplementing the
registers and behavior of the RT1711H/RT1715, fallback compatibles will
scale better.

Link: https://lore.kernel.org/all/20260220-et7304-v3-2-ede2d9634957@gmail.com/
Signed-off-by: Alexey Charkov <alchark@flipper.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260318-husb311-v4-2-69e029255430@flipper.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>