common: Drop linux/delay.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/host/utmi-armada100.c b/drivers/usb/host/utmi-armada100.c
index 8a40f66..5d66e58 100644
--- a/drivers/usb/host/utmi-armada100.c
+++ b/drivers/usb/host/utmi-armada100.c
@@ -14,6 +14,7 @@
 #include <asm/arch/cpu.h>
 #include <asm/arch/armada100.h>
 #include <asm/arch/utmi-armada100.h>
+#include <linux/delay.h>
 
 static int utmi_phy_init(void)
 {