dm: usb: Drop the EHCI weak functions

These are a pain with driver model because we might have different EHCI
drivers which want to implement them differently. Now that they use
consistent function signatures, we can in good conscience move them to
a struct.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
Fix non-driver-model EHCI to set up the EHCI operations correctly:
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/genesi/mx51_efikamx/efikamx-usb.c b/board/genesi/mx51_efikamx/efikamx-usb.c
index 0c0b8d3..9dfd249 100644
--- a/board/genesi/mx51_efikamx/efikamx-usb.c
+++ b/board/genesi/mx51_efikamx/efikamx-usb.c
@@ -173,8 +173,9 @@
 	return 0;
 }
 
-void ehci_powerup_fixup(struct ehci_ctrl *ctrl, uint32_t *status_reg,
-			uint32_t *reg)
+/* This overrides a weak function */
+void mx5_ehci_powerup_fixup(struct ehci_ctrl *ctrl, uint32_t *status_reg,
+			   uint32_t *reg)
 {
 	uint32_t port = OTG_BASE_ADDR + (0x200 * CONFIG_MXC_USB_PORT);
 	struct usb_ehci *ehci = (struct usb_ehci *)port;