usb: Remove usb_dev_init() from ehci-ppc4xx.c

Calling usb_dev_init() from within the EHCI host driver is wrong.
The EHCI host driver should have no dependency/interconnection to the
USB device driver.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Remy Bohmer <linux@bohmer.net>

drivers/usb/host/ehci-ppc4xx.c

@@ -34,7 +34,6 @@ int ehci_hcd_init(void)
 	hccr = (struct ehci_hccr *)(CONFIG_SYS_PPC4XX_USB_ADDR);
 	hcor = (struct ehci_hcor *)((uint32_t) hccr +
 		HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
-	usb_dev_init();
 	return 0;
 }