ARM: dts: msm: disable UFS on 8084 boards having old power grid

Newer and stable Toshiba UFS devices require the newer power grid and
older toshiba UFS devices (on boards having older power grid) are no
longer supported by the UFS driver hence disable the UFS device probing
on those boards.

Change-Id: Iba5e46b1e0b12d3e37891a2e7ae4f30e90ce956b
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>