usb: ehci: Use map_physmem in ehci-generic

Some architectures, like MIPS, require remapping of the registers.
Add the map_physmem() call to handle it.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>

drivers/usb/host/ehci-generic.c

@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <clk.h>
+#include <asm/io.h>
 #include <dm.h>
 #include "ehci.h"
 
@@ -20,7 +21,7 @@ struct generic_ehci {
 
 static int ehci_usb_probe(struct udevice *dev)
 {
-	struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
+	struct ehci_hccr *hccr;
 	struct ehci_hcor *hcor;
 	int i;
 
@@ -36,6 +37,7 @@ static int ehci_usb_probe(struct udevice *dev)
 			       clk_dev->name, clk_id);
 	}
 
+	hccr = map_physmem(dev_get_addr(dev), 0x100, MAP_NOCACHE);
 	hcor = (struct ehci_hcor *)((uintptr_t)hccr +
 				    HC_LENGTH(ehci_readl(&hccr->cr_capbase)));