usb: add CONFIG_USB_OHCI_HCD in Kconfig

Add this option as a common config for all OHCI controllers.  Its
help message was copied from Linux.  Also, I moved it below EHCI
to respect the order in Linux's Kconfig.

Add CONFIG_USB_OHCI_HCD=y to axs103_defconfig, which is the only
user of OHCI_GENERIC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

configs/axs103_defconfig

@@ -25,6 +25,7 @@ CONFIG_ETH_DESIGNWARE=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
+CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_GENERIC=y
 CONFIG_USB_STORAGE=y
 CONFIG_USE_PRIVATE_LIBGCC=y

drivers/usb/host/Kconfig

@@ -24,15 +24,7 @@ config USB_XHCI_DWC3
 	  Say Y or if your system has a Dual Role SuperSpeed
 	  USB controller based on the DesignWare USB3 IP Core.
 
-endif
-
-config USB_OHCI_GENERIC
-	bool "Support for generic OHCI USB controller"
-	depends on OF_CONTROL
-	depends on DM_USB
-	default n
-	---help---
-	  Enables support for generic OHCI controller.
+endif # USB_XHCI_HCD
 
 config USB_EHCI_HCD
 	bool "EHCI HCD (USB 2.0) support"
@@ -116,4 +108,27 @@ config USB_EHCI_GENERIC
 	---help---
 	  Enables support for generic EHCI controller.
 
-endif
+endif # USB_EHCI_HCD
+
+config USB_OHCI_HCD
+	bool "OHCI HCD (USB 1.1) support"
+	---help---
+	  The Open Host Controller Interface (OHCI) is a standard for accessing
+	  USB 1.1 host controller hardware.  It does more in hardware than Intel's
+	  UHCI specification.  If your USB host controller follows the OHCI spec,
+	  say Y.  On most non-x86 systems, and on x86 hardware that's not using a
+	  USB controller from Intel or VIA, this is appropriate.  If your host
+	  controller doesn't use PCI, this is probably appropriate.  For a PCI
+	  based system where you're not sure, the "lspci -v" entry will list the
+	  right "prog-if" for your USB controller(s):  EHCI, OHCI, or UHCI.
+
+if USB_OHCI_HCD
+
+config USB_OHCI_GENERIC
+	bool "Support for generic OHCI USB controller"
+	depends on OF_CONTROL
+	depends on DM_USB
+	---help---
+	  Enables support for generic OHCI controller.
+
+endif # USB_OHCI_HCD