delta: Fix OHCI_REGS_BASE undeclared and wait_ms implicit declaration

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/pxa/usb.c b/cpu/pxa/usb.c
index d2812a4..72b7dfa 100644
--- a/cpu/pxa/usb.c
+++ b/cpu/pxa/usb.c
@@ -27,6 +27,7 @@
 # if defined(CONFIG_CPU_MONAHANS) || defined(CONFIG_PXA27X)
 
 #include <asm/arch/pxa-regs.h>
+#include <usb.h>
 
 int usb_cpu_init(void)
 {