drm/msm/dpu: split _dpu_encoder_resource_control_helper()

Follow the _dpu_encoder_irq_control() change and split the
_dpu_encoder_resource_control_helper() into enable and disable parts.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/577525/
Link: https://lore.kernel.org/r/20240208-fd_remove_phys_ops_atomic_mode_set-v4-2-caf5dcd125c0@linaro.org