commit 8b416b0b upstream.

Now that DaVinci glue layer can be modular, we must export cppi_interrupt()
that it may call...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>