usb: ohci-hcd: Remove some unused legacy code

At this point, the only user of ohci-hcd that also uses PCI is using DM,
so we can drop CONFIG_PCI_OHCI* usage.  No platforms set either of
CONFIG_SYS_USB_OHCI_BOARD_INIT or CONFIG_SYS_USB_OHCI_CPU_INIT so those
hooks can be removed as well.

Signed-off-by: Tom Rini <trini@konsulko.com>

doc/README.generic_usb_ohci

@@ -11,18 +11,6 @@ Configuration options
 
 	CONFIG_USB_OHCI_NEW: enable the new OHCI driver
 
-	CONFIG_SYS_USB_OHCI_BOARD_INIT: call the board dependant hooks:
-
-		  - extern int board_usb_init(void);
-		  - extern int usb_board_stop(void);
-		  - extern int usb_cpu_init_fail(void);
-
-	CONFIG_SYS_USB_OHCI_CPU_INIT: call the cpu dependant hooks:
-
-		  - extern int usb_cpu_init(void);
-		  - extern int usb_cpu_stop(void);
-		  - extern int usb_cpu_init_fail(void);
-
 	CONFIG_SYS_USB_OHCI_REGS_BASE: defines the base address of the OHCI
 				registers
 
@@ -43,21 +31,3 @@ config option
 
 needs to be defined.
 
-
-PCI Controllers
-----------------
-
-You'll need to define
-
-	CONFIG_PCI_OHCI
-
-If you have several USB PCI controllers, define
-
-	CONFIG_PCI_OHCI_DEVNO: number of the OHCI device in PCI list
-
-If undefined, the first instance found in PCI space will be used.
-
-PCI Controllers need to do byte swapping on register accesses, so they
-should to define:
-
-	CONFIG_SYS_OHCI_SWAP_REG_ACCESS