PCI: keystone: Don't select CONFIG_PCI_KEYSTONE_HOST by default

Drivers should not be selected by default because that bloats the kernel
for people who don't need them.

Remove the "default y" for CONFIG_PCI_KEYSTONE_HOST.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: linux-arm-kernel@lists.infradead.org

drivers/pci/controller/dwc/Kconfig

@@ -111,7 +111,6 @@ config PCI_KEYSTONE_HOST
 	depends on PCI_MSI_IRQ_DOMAIN
 	select PCIE_DW_HOST
 	select PCI_KEYSTONE
-	default y
 	help
 	  Enables support for the PCIe controller in the Keystone SoC to
 	  work in host mode. The PCI controller on Keystone is based on