clk: msm: osm: add panic handler to dump status registers

Add a panic handler to dump the OS performance state,
program counter OSM watchdog registers, and the APM status
register when the device crashes due to a kernel panic.
These are critical registers that are useful for debug.

CRs-Fixed: 1033031
Change-Id: I2bbf6884cf83457bfb7e5369bb97614bd4beb150
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>