PCI: dra7xx: Don't select CONFIG_PCI_DRA7XX_HOST by default

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

Enable CONFIG_PCI_DRA7XX_HOST by default only if SOC_DRA7XX.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: linux-omap@vger.kernel.org

drivers/pci/controller/dwc/Kconfig

@@ -26,7 +26,7 @@ config PCI_DRA7XX_HOST
 	depends on OF && HAS_IOMEM && TI_PIPE3
 	select PCIE_DW_HOST
 	select PCI_DRA7XX
-	default y
+	default y if SOC_DRA7XX
 	help
 	  Enables support for the PCIe controller in the DRA7xx SoC to work in
 	  host mode. There are two instances of PCIe controller in DRA7xx.