msm: board: Add new API to dump debug info

Information such as clock states & its rates can be useful in
debugging error scenarios. clk_dump_debug_info() will output machine
specific info.

Change-Id: I08084affdad2385dcc98aba266aed8746fbdee6c
Signed-off-by: Ranjhith Kalisamy <ranjhith@codeaurora.org>