arm: socfpga: stratix10: Add mailbox support for Stratix10 SoC

Add mailbox support for Stratix SoC

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
Reviewed-by: Marek Vasut <marex@denx.de>
3 files changed