Enable prepare_prev_first flag for BF060Y8M-AJ0 panel so that the
previous controller should be prepared first before the prepare for
the panel is called.

This makes sure that the previous controller, likely to be a DSI host
controller should be initialized to LP-11 before the panel is powered up.
Suggested-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Dang Huynh <danct12@riseup.net>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240722-bf060y8m-aj0-prepare-prev-v1-1-0e51c0f59d22@riseup.netSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240722-bf060y8m-aj0-prepare-prev-v1-1-0e51c0f59d22@riseup.net