[POWERPC] 85xx: Enable MSI support for 85xxds board

This patch enabled MSI on 8544ds and 8572ds board.
So far only one MSI interrupt can generate on 8544 board.

Signed-off-by: Jason Jin <Jason.jin@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
3 files changed