dt-bindings: media: renesas,vin: Fix field-even-active spelling

make dt_binding_check:

    field-active-even: missing type definition

The property is named "field-even-active", not "field-active-even".

Fixes: 3ab7801d ("media: dt-bindings: media: rcar-vin: Describe optional ep properties")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/c999eef0a14c8678f56eb698d27b2243e09afed4.1696328563.git.geert+renesas@glider.be


Signed-off-by: Rob Herring <robh@kernel.org>