drm/panel: sw43408: Switch to devm_regulator_bulk_get_const

drm/panel: sw43408: Switch to devm_regulator_bulk_get_const

Switch to devm_regulator_bulk_get_const() to stop setting the supplies
list in probe(), and move the regulator_bulk_data struct in static const.

Cosmetic: adjust comment for regulator from 1.88V to 1.8 V.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251214-pixel-3-v7-6-b1c0cf6f224d@ixit.cz