usb: chipidea: add runtime power management support

Add runtime power management support.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index 535997a..39ba00f 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -19,6 +19,7 @@
 	enum usb_phy_interface phy_mode;
 	unsigned long	 flags;
 #define CI_HDRC_REGS_SHARED		BIT(0)
+#define CI_HDRC_SUPPORTS_RUNTIME_PM	BIT(2)
 #define CI_HDRC_DISABLE_STREAMING	BIT(3)
 	/*
 	 * Only set it when DCCPARAMS.DC==1 and DCCPARAMS.HC==1,