ARM: dts: msm: Use aggre2_noc voter clock handle for SDM660/630

From bus driver, use aggre2_noc voter clock handle for voting
instead of using direct aggre2_noc clock, as this clock
can be enabled/disabled/set_rate from multiple clients.

Change-Id: I247f12c90b9b9900ebd9785454e8bd2b9dc13b96
Signed-off-by: Amit Nischal <anischal@codeaurora.org>