drm/i2c/tda998x: drop use of drmP.h

Drop use of the deprecated drmP.h header file.
Fix fallout.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190804094132.29463-2-sam@ravnborg.org

drivers/gpu/drm/i2c/tda998x_drv.c

@@ -13,10 +13,10 @@
 #include <sound/asoundef.h>
 #include <sound/hdmi-codec.h>
 
-#include <drm/drmP.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
+#include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/i2c/tda998x.h>