soc: mediatek: cmdq: add jump function

Add jump function so that client can jump to any address which
contains instruction.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
Link: https://lore.kernel.org/r/1594136714-11650-8-git-send-email-dennis-yc.hsieh@mediatek.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>