Add V4L2_PIX_FMT_RGB24 pixel format support

This is the format used by the gxp v4l2 driver.

Change-Id: Ia78e39b95f1cdffa2df111d1f1af4cb9c290cc9f
Signed-off-by: charles kearney <charles.kearney@hpe.com>
diff --git a/ikvm_video.hpp b/ikvm_video.hpp
index 17477df..449f57e 100644
--- a/ikvm_video.hpp
+++ b/ikvm_video.hpp
@@ -85,6 +85,14 @@
         return height;
     }
     /*
+     * @brief Gets the pixel format  of the video frame
+     *
+     * @return Value of the pixel format of video frame */
+    inline uint32_t getPixelformat() const
+    {
+        return pixelformat;
+    }
+    /*
      * @brief Gets the width of the video frame
      *
      * @return Value of the width of video frame in pixels
@@ -166,6 +174,9 @@
     const std::string path;
     /* @brief Streaming buffer storage */
     std::vector<Buffer> buffers;
+
+    /* @brief Pixel Format  */
+    uint32_t pixelformat;
 };
 
 } // namespace ikvm