Rockchip: Support V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME

Also removed V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE.
Since we are using the header files from system instead of package,
changing v4l2_buffer structure member name.

BUG=chrome-os-partner:53551
TEST=run vea test and pass force key frame test case.
CQ-DEPEND=CL:346400,CL:346390

Change-Id: I369d03293bd6e4b5cdb7f1ed66b8fe001fc77084
Reviewed-on: https://chromium-review.googlesource.com/346361


Commit-Ready: Heng-ruey Hsu <henryhsu@chromium.org>
Tested-by: Heng-ruey Hsu <henryhsu@chromium.org>
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Reviewed-by: Wu-cheng Li <wuchengli@chromium.org>

libv4l-rockchip/libv4l-encplugin-rockchip.c

@@ -341,8 +341,7 @@ static int ioctl_qbuf_locked(struct encoder_context *ctx, int fd,
 	if (ret)
 		return ret;
 
-	/* TODO: change this to config_store after the header is updated. */
-	buffer->reserved2 = buffer->index + 1;
+	buffer->config_store = buffer->index + 1;
 	ret = SYS_IOCTL(fd, VIDIOC_QBUF, buffer);
 	if (ret == 0)
 		ctx->can_qbuf = false;
@@ -420,9 +419,7 @@ static int ioctl_s_ext_ctrls_locked(struct encoder_context *ctx, int fd,
 	 */
 	for (i = 0; i < ext_ctrls->count; i++) {
 		switch (ext_ctrls->controls[i].id) {
-		case V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE:
-			if (ext_ctrls->controls[i].value ==
-					V4L2_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE_I_FRAME)
+		case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
 			runtime_param_ptr->keyframe_request = true;
 			break;
 		case V4L2_CID_MPEG_VIDEO_BITRATE: