ARM: dts: renesas: gose: Remove superfluous port property

ARM: dts: renesas: gose: Remove superfluous port property

'bus-width' is defined for the corresponding vin input port already.
No need to declare it in the output port again. Fixes:

    arch/arm/boot/dts/renesas/r8a7793-gose.dtb: composite-in@20 (adi,adv7180cp): ports:port@3:endpoint: Unevaluated properties are not allowed ('bus-width' was unexpected)
    from schema $id: http://devicetree.org/schemas/media/i2c/adi,adv7180.yaml#

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20250929093616.17679-2-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>