ARM: dts: msm: Disable multimedia core power collapse on 8226v1

Collapse and restore of power to the multimedia cores may cause
CX and MX voltage rail droop, which presents a potential
stability risk. This has been resolved in hardware on 8226v2.

Change-Id: I1de2b58c6b3b2632d057bd65128cd56e35316068
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>