ldrp_V2 : Extract epoch info from clock data struct

Extracts the epoch data from clock data struct.
This helps in converting HLOS timestamps to non-HLOS
timestamps and vica-versa. This also additionally logs
the Linux Banner for ease in post-processing.

Change-Id: I6598d3dfb8c2c591f12cd3f77ab8de0363c76e0b
Signed-off-by: Kumar Harsh <harkumar@codeaurora.org>