ARM: dts: msm: add the mmss_misc_io register base for DSI1 node for 8939

Add the mmss_misc_io register base and offset address for DSI1 node
for 8939 target. This is needed to enable/disable the DSI1 clamps
in case ULPS feature is enabled.

Change-Id: Ifbcab93c42293db2988df9a41383b905605247b8
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>