ARM: dts: msm: Remove the deep nap timer and clk_map for msm8937

Remove deep nap timer which allows CPU to power collapse.

clk_map: we have made the transition to clock-names, remove
the clk_map to support associated infrastructure.

Change-Id: I364bc7390b95a6c915f8ed4a4e6eaa258e3d24c6
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>