[Intel-gfx] Req: split off intel pch definition and move into include/drm/

[Koba Ko]

Previously, AMD had an issue about noise  with AMD-DG on the RKL platform
AMD provided a parameter.
#modprobe amdgpu ppfeaturemask=0xfff7bffb

 I thought it's better to check and assign values in amd gpu.
Have a trouble determining the type of pch(RKL or else),
search in amd drm driver and can't find any about this.
Would someone please guide me? if there's an existing function.

here's a proposal, check RKL PCH in amd driver,
the pch definitions must be splitted off from intel_pch.h in i915
folder to include/drm/intel_pch_definition.h

> --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
> +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
> @@ -1629,7 +1629,7 @@ static void smu7_init_dpm_defaults(struct pp_hwmgr *hwmgr)
>
>         data->mclk_dpm_key_disabled = hwmgr->feature_mask & PP_MCLK_DPM_MASK ? false : true;
>         data->sclk_dpm_key_disabled = hwmgr->feature_mask & PP_SCLK_DPM_MASK ? false : true;
> -       data->pcie_dpm_key_disabled = hwmgr->feature_mask & PP_PCIE_DPM_MASK ? false : true;
> +       data->pcie_dpm_key_disabled = is_rkl_pch() || !(hwmgr->feature_mask & PP_PCIE_DPM_MASK);
>         /* need to set voltage control types before EVV patching */
>         data->voltage_control = SMU7_VOLTAGE_CONTROL_NONE;
>         data->vddci_control = SMU7_VOLTAGE_CONTROL_NONE;