usbdebug: Consolidate EHCI_BAR setup

There is assumption of static EHCI_BAR_INDEX, try to
clean it up by bringing BAR programming at one spot.

Change-Id: Ie16090536ac5470c24720a54813015250ae2d0dd
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/20825
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/soc/intel/broadwell/usb_debug.c

@@ -41,12 +41,4 @@ void pci_ehci_dbg_set_port(pci_devfn_t dev, unsigned int port)
 
 void pci_ehci_dbg_enable(pci_devfn_t dev, unsigned long base)
 {
-	if (!dev)
-		return;
-
-	/* Set the EHCI BAR address. */
-	pci_write_config32(dev, EHCI_BAR_INDEX, base);
-
-	/* Enable access to the EHCI memory space registers. */
-	pci_write_config8(dev, PCI_COMMAND, PCI_COMMAND_MEMORY);
 }