ARM: dts: msm: Add missing qpic clk vote on mdmcalifornium

core_clk is not being voted by qpic display driver. This change
adds the clock to the configuration to enable voting by the
driver.

Change-Id: I86c0534c7924d508b497258abbceb1bced3be584
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>