dt-bindings: media: microchip-video-dma: add option property

added fix for the warning "'reset-gpios' do not match any of the regexes:"

add option property "gpio-reset" in video-dma-rtl.yaml file, this
gpio can be used to reset the mipicsi2 training circuit.

Signed-off-by: Shravan Chippa <shravan.chippa@microchip.com>Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Author: shravanI35088

Documentation/devicetree/bindings/media/microchip,video-dma.yaml

@@ -44,6 +44,10 @@ properties:
     description: Reserved memory for v4l2 buffers (optional)
     maxItems: 1
 
+  reset-gpios:
+    maxItems: 1
+    description: CSI2 module MIPI training reset
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports