USB: ohci-omap - avoid including mach/irqs.h

ohci-omap doesn't need to include mach/irqs.h - nothing within this
driver needs anything from this header file.  Remove this include.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ohci-omap.c

@@ -36,7 +36,6 @@
 #include <mach/mux.h>
 
 #include <mach/hardware.h>
-#include <mach/irqs.h>
 #include <mach/usb.h>