linux-phytec-ti

remoteproc/omap: check for undefined mailbox messages

In case the remoteproc sends a message that is beyond the
last valid message, print it as an error message.

Signed-off-by: Subramaniam Chanderashekarapuram <subramaniam.ca@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>