drm/radeon: only apply bapm changes for AC power on ARUBA

Newer asics shouldn't need any manual adjustment.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_pm.c

@@ -73,8 +73,10 @@ void radeon_pm_acpi_event_handler(struct radeon_device *rdev)
 			rdev->pm.dpm.ac_power = true;
 		else
 			rdev->pm.dpm.ac_power = false;
+		if (rdev->family == CHIP_ARUBA) {
 			if (rdev->asic->dpm.enable_bapm)
 				radeon_dpm_enable_bapm(rdev, rdev->pm.dpm.ac_power);
+		}
 		mutex_unlock(&rdev->pm.mutex);
         } else if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 		if (rdev->pm.profile == PM_PROFILE_AUTO) {