drm/panel: synaptics-tddi: fix build error by missing regulator/consumer.h include

drm/panel: synaptics-tddi: fix build error by missing regulator/consumer.h include

Fix up for "backlight: Do not include <linux/fb.h> in header file"
interacting with [1] from the drm-misc tree.

[1] commit 3eae82503f4f ("drm: panel: add support for Synaptics TDDI series DSI panels")

Fixes: 3eae82503f4f ("drm: panel: add support for Synaptics TDDI series DSI panels")
Closes: https://lore.kernel.org/all/20251030151428.3c1f11ea@canb.auug.org.au/
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251030-topic-drm-fix-panel-synaptics-tddi-v1-1-206519d246e8@linaro.org