drm/msm/dsi/phy: Add support for SM8750

drm/msm/dsi/phy: Add support for SM8750

Add support for DSI PHY v7.0 on Qualcomm SM8750 SoC which comes with an
incompatible hardware interface change:

ICODE_ACCUM_STATUS_LOW and ALOG_OBSV_BUS_STATUS_1 registers - their
offsets were just switched.  Currently these registers are not used in
the driver, so the easiest is to document both but keep them commented
out to avoid conflict.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/659616/
Link: https://lore.kernel.org/r/20250618-b4-sm8750-display-v7-6-a591c609743d@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>