libata: zpodd: should depend on PM_RUNTIME

ZPODD is built on top of runtime PM functionality, it doesn't make sense
to have it in a kernel that doesn't have CONFIG_PM_RUNTIME set.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index e4ac819..0bec5ac 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -60,7 +60,7 @@
 
 config SATA_ZPODD
 	bool "SATA Zero Power Optical Disc Drive (ZPODD) support"
-	depends on ATA_ACPI
+	depends on ATA_ACPI && PM_RUNTIME
 	default n
 	help
 	  This option adds support for SATA Zero Power Optical Disc