msm: clock-8226: Add voter clocks for the crypto engine

Since this rcg is used by both the qseecom and scm drivers, a
voter clock is necessary to provide the greater of the two requested
rates.

Change-Id: I67dde8e1e06ea917aebb36d4cd741e2d8172bd10
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>