msm: mdss: enable mmagic gdsc before turning on mdp gdsc

MDP, DSI, HDMI and PLL modules turn on mdp gdsc independently.
It is illegal to turn on mdp gdsc without turning on mmagic
gdsc on thulium target. This change adds mmagic vote
for these modules.

Change-Id: I765fcc42477b9e46d0da48cb0cf5b298f58b7815
[veeras@codeaurora.org: As part of 3.18 upgrade,
remove msmthulium-mdss-pll.dtsi, msmthulium-mdss.dtsi changes
from this gerit]
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>