dt-bindings: usb: gpio-sbu-mux: Add an entry for TMUXHS4212

Add a compatible entry for the TI TMUXHS4212 GPIO-based
bidirectional 2:1 mux/1:2 demux which can be used for
switching orientation of the SBU lines in USB Type-C
applications.

TMUXHS4212 datasheet: https://www.ti.com/lit/ds/symlink/tmuxhs4212.pdf

Signed-off-by: Parth Pancholi <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Francesco Dolcini <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/gpio-sbu-mux.yaml

···
           - nxp,cbdtu02043
           - onnn,fsusb43l10x
           - pericom,pi3usb102
+          - ti,tmuxhs4212
       - const: gpio-sbu-mux
 
   enable-gpios: