cnss2: Add debug dump for Wlan FW PBL and SBL

Primary and secondary bootloader debug data is required to debug
FW initialization issues. Add support to dump debug data for
PBL and SBL.

Change-Id: I0626e38f1e2dfa02749033b2657c1567c15afe80
Signed-off-by: Manikandan Mohan <manikand@codeaurora.org>