usb: musb: cppi_dma: export cppi_interrupt()

Now that DaVinci glue layer can be modular, we must export cppi_interrupt()
that it may call...

Cc: stable@vger.kernel.org # 3.0+
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/cppi_dma.c

@@ -1314,6 +1314,7 @@ irqreturn_t cppi_interrupt(int irq, void *dev_id)
 
 	return IRQ_HANDLED;
 }
+EXPORT_SYMBOL_GPL(cppi_interrupt);
 
 /* Instantiate a software object representing a DMA controller. */
 struct dma_controller *__devinit