soc: qcom: Optimize minidump collection check and add debug log

This change does additional checks for more imem ToC entries
before invoking minidump.
This change also add few debug logs to ease process of debugging.

Change-Id: Ie70301d70fe85ec9f85573c0167098319c2b1cfe
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>