usb: xhci: Convert CONFIG_USB_XHCI_PCI to Kconfig

Add CONFIG_USB_XHCI_PCI as a Kconfig option.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>

drivers/usb/host/Kconfig

@@ -31,6 +31,12 @@ config USB_XHCI_MVEBU
 	  SoCs, which includes Armada8K, Armada3700 and other Armada
 	  family SoCs.
 
+config USB_XHCI_PCI
+	bool "Support for PCI-based xHCI USB controller"
+	default y if X86
+	help
+	  Enables support for the PCI-based xHCI controller.
+
 config USB_XHCI_ROCKCHIP
 	bool "Support for Rockchip on-chip xHCI USB controller"
 	depends on ARCH_ROCKCHIP

scripts/config_whitelist.txt

@@ -5194,7 +5194,6 @@ CONFIG_USB_XHCI_EXYNOS
 CONFIG_USB_XHCI_FSL
 CONFIG_USB_XHCI_KEYSTONE
 CONFIG_USB_XHCI_OMAP
-CONFIG_USB_XHCI_PCI
 CONFIG_USER_LOWLEVEL_INIT
 CONFIG_USE_FDT
 CONFIG_USE_INTERRUPT