usb: Remove <common.h> and add needed includes

Remove <common.h> from this driver directory and when needed
add missing include files directly.

Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 765336a..a95fcad 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -10,8 +10,8 @@
  *
  */
 
-#include <common.h>
 #include <log.h>
+#include <time.h>
 #include <usb.h>
 #include <linux/delay.h>
 #include <usb/ulpi.h>