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: Stefan Roese <sr@denx.de>
Cc: Remy Bohmer <linux@bohmer.net>
diff --git a/drivers/usb/host/ehci-ppc4xx.c b/drivers/usb/host/ehci-ppc4xx.c
index 946a0a0..1179919 100644
--- a/drivers/usb/host/ehci-ppc4xx.c
+++ b/drivers/usb/host/ehci-ppc4xx.c
@@ -34,7 +34,6 @@
 	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;
 }