ARM: dts: msm: Remove additional clocks in pm node

MDM targets have single cpu. PM node associates each clock mentioned
within the node to a CPU. Since there is only one CPU available, there
should only one clock. Remove the other 3 clocks.

Change-Id: I671567577ba96761f02e5db36db993374c6f52b8
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>