ata: ahci_tegra: call tegra_powergate_power_off only when PM domain is not present

This patch adds check to call legacy power domain API
tegra_powergate_power_off() only when PM domain is not present.

Fixes: 868ed7311cd8 ("ata: ahci_tegra: Add AHCI support for Tegra186")
Reviewed-by: Dmitry Osipenko <[e-mail]>
Acked-by: Thierry Reding <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Sowjanya Komatineni <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/ata/ahci_tegra.c

···
 disable_power:
 	clk_disable_unprepare(tegra->sata_clk);
 
-	tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
+	if (!tegra->pdev->dev.pm_domain)
+		tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
 
 disable_regulators:
 	regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
···
 	reset_control_assert(tegra->sata_cold_rst);
 
 	clk_disable_unprepare(tegra->sata_clk);
-	tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
+	if (!tegra->pdev->dev.pm_domain)
+		tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
 
 	regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
 }