mailbox: ZynqMP IPI mailbox controller

This patch is to introduce ZynqMP IPI mailbox controller driver
to use the ZynqMP IPI block as mailboxes.

Signed-off-by: Wendy Liang <wendy.liang@xilinx.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
4 files changed