drm/exynos: use src_x and src_y instead of fb_x and fb_y

It's more reasonable to use src_x and src_y to represent source as
counterpart of destination(crtc). Already we are using src_width and
src_height for width and height of source.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index 043a6ba..5cb4ced 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -111,12 +111,12 @@
 	}
 
 	/* set drm framebuffer data. */
-	exynos_plane->fb_x = src_x;
-	exynos_plane->fb_y = src_y;
-	exynos_plane->fb_width = fb->width;
-	exynos_plane->fb_height = fb->height;
+	exynos_plane->src_x = src_x;
+	exynos_plane->src_y = src_y;
 	exynos_plane->src_width = src_w;
 	exynos_plane->src_height = src_h;
+	exynos_plane->fb_width = fb->width;
+	exynos_plane->fb_height = fb->height;
 	exynos_plane->bpp = fb->bits_per_pixel;
 	exynos_plane->pitch = fb->pitches[0];
 	exynos_plane->pixel_format = fb->pixel_format;