drm/mm: Convert to drm_printer

Including all drivers. I thought about keeping small compat functions
to avoid having to change all drivers. But I really like the
drm_printer idea, so figured spreading it more widely is a good thing.

v2: Review from Chris:
- Natural argument order and better name for drm_mm_print.
- show_mm() macro in the selftest.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483009764-8281-1-git-send-email-daniel.vetter@ffwll.ch

include/drm/drm_mm.h

@@ -42,12 +42,10 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
-#ifdef CONFIG_DEBUG_FS
-#include <linux/seq_file.h>
-#endif
 #ifdef CONFIG_DRM_DEBUG_MM
 #include <linux/stackdepot.h>
 #endif
+#include <drm/drm_print.h>
 
 #ifdef CONFIG_DRM_DEBUG_MM
 #define DRM_MM_BUG_ON(expr) BUG_ON(expr)
@@ -462,9 +460,6 @@ bool drm_mm_scan_remove_block(struct drm_mm_scan *scan,
 			      struct drm_mm_node *node);
 struct drm_mm_node *drm_mm_scan_color_evict(struct drm_mm_scan *scan);
 
-void drm_mm_debug_table(const struct drm_mm *mm, const char *prefix);
-#ifdef CONFIG_DEBUG_FS
-int drm_mm_dump_table(struct seq_file *m, const struct drm_mm *mm);
-#endif
+void drm_mm_print(const struct drm_mm *mm, struct drm_printer *p);
 
 #endif