ACPI: Make PCI slot detection driver depend on PCI

Since this is ACPI PCI slot detection driver for PCI, it doesn't make sense
to compile this without PCI support in place.

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/Kconfig

@@ -369,7 +369,7 @@ config ACPI_DEBUG
 
 config ACPI_PCI_SLOT
 	bool "PCI slot detection driver"
-	depends on SYSFS
+	depends on SYSFS && PCI
 	help
 	  This driver creates entries in /sys/bus/pci/slots/ for all PCI
 	  slots in the system.  This can help correlate PCI bus addresses,