drm, kdb, kms: Change mode_set_base_atomic() enter argument to be an enum

The enter argument as implemented by commit 413d45d3627 (drm, kdb, kms:
Add an enter argument to mode_set_base_atomic() API) should be more
descriptive as to what it does vs just passing 1 and 0 around.

There is no runtime behavior change as a result of this patch.

Reported-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
CC: David Airlie <airlied@linux.ie>
CC: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
index 6a9f393..73b0712 100644
--- a/include/drm/drm_crtc_helper.h
+++ b/include/drm/drm_crtc_helper.h
@@ -39,6 +39,11 @@
 
 #include <linux/fb.h>
 
+enum mode_set_atomic {
+	LEAVE_ATOMIC_MODE_SET,
+	ENTER_ATOMIC_MODE_SET,
+};
+
 struct drm_crtc_helper_funcs {
 	/*
 	 * Control power levels on the CRTC.  If the mode passed in is
@@ -62,7 +67,7 @@
 			     struct drm_framebuffer *old_fb);
 	int (*mode_set_base_atomic)(struct drm_crtc *crtc,
 				    struct drm_framebuffer *fb, int x, int y,
-				    int is_enter);
+				    enum mode_set_atomic);
 
 	/* reload the current crtc LUT */
 	void (*load_lut)(struct drm_crtc *crtc);