drm/amd: Use amdgpu_device_pcie_dynamic_switching_supported() for SMU7

SMU7 does a check if the dGPU is inserted into a Rocket Lake system,
to turn off DPM.  Extend this check to all systems that have problems
with dynamic switching by using the
amdgpu_device_pcie_dynamic_switching_supported() helper.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c

@@ -1798,17 +1798,6 @@ static int smu7_disable_dpm_tasks(struct pp_hwmgr *hwmgr)
 	return result;
 }
 
-static bool intel_core_rkl_chk(void)
-{
-#if IS_ENABLED(CONFIG_X86_64)
-	struct cpuinfo_x86 *c = &cpu_data(0);
-
-	return (c->x86 == 6 && c->x86_model == INTEL_FAM6_ROCKETLAKE);
-#else
-	return false;
-#endif
-}
-
 static void smu7_init_dpm_defaults(struct pp_hwmgr *hwmgr)
 {
 	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
@@ -1835,7 +1824,8 @@ 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 =
-		intel_core_rkl_chk() || !(hwmgr->feature_mask & PP_PCIE_DPM_MASK);
+		!amdgpu_device_pcie_dynamic_switching_supported() ||
+		!(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;