powerpc/85xx: Add support for ULI1575 PCI EHCI module on MPC8572DS

MPC8572DS provides 2 USB ports with ULI1575. We enable USB storage
device support using PCI EHCI module.

Signed-off-by: Zhao Chenhui <b35336@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

include/configs/MPC8572DS.h

@@ -672,6 +672,20 @@
 #define CONFIG_CMD_EXT2
 #endif
 
+/*
+ * USB
+ */
+#define CONFIG_USB_EHCI
+
+#ifdef CONFIG_USB_EHCI
+#define CONFIG_CMD_USB
+#define CONFIG_USB_EHCI_PCI
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET
+#define CONFIG_USB_STORAGE
+#define CONFIG_PCI_EHCI_DEVICE			0
+#define CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS	2
+#endif
+
 #undef CONFIG_WATCHDOG			/* watchdog disabled */
 
 /*