ARM: dts: msm: Add extra clock definitions for IOMMUs

Several of the IOMMUs on msm-samarium require extra clock
votes. Add this information to the device tree.

Signed-off-by: Neeti Desai <neetid@codeaurora.org>
Change-Id: I181dcaa9c91a57114ba354a4a646aba0f17e1b2c