drm/exynos: add global macro for the default primary plane

Define DEFAULT_WIN as zero to help set the primary plane on all CRTCs.
Some CRTCs were defining a variable to store the default window, but that
is not necessary as the default (primary) window is always the window zero.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index b3c7307..f467ce0 100644
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -33,7 +33,6 @@
 	struct exynos_drm_plane		planes[WINDOWS_NR];
 	void __iomem			*addr;
 	struct clk			*clks[6];
-	unsigned int			default_win;
 	unsigned long			irq_flags;
 	int				pipe;
 	bool				suspended;
@@ -501,7 +500,7 @@
 	ctx->pipe = priv->pipe++;
 
 	for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
-		type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
+		type = (zpos == DEFAULT_WIN) ? DRM_PLANE_TYPE_PRIMARY :
 							DRM_PLANE_TYPE_OVERLAY;
 		ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
 				1 << ctx->pipe, type, decon_formats,
@@ -510,7 +509,7 @@
 			return ret;
 	}
 
-	exynos_plane = &ctx->planes[ctx->default_win];
+	exynos_plane = &ctx->planes[DEFAULT_WIN];
 	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
 					ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
 					&decon_crtc_ops, ctx);
@@ -607,7 +606,6 @@
 	if (!ctx)
 		return -ENOMEM;
 
-	ctx->default_win = 0;
 	ctx->suspended = true;
 	ctx->dev = dev;
 	if (of_get_child_by_name(dev->of_node, "i80-if-timings"))