icnss2: Fix incomplete fw_build_id in IPC logs

Fix incomplete fw_build_id in IPC logging due to MAX
character limit. Cleaned up in debug code.

Change-Id: Ia0f104158645e27f774d9598883cfcd8ec765d3c
Signed-off-by: Naman Padhiar <quic_npadhiar@quicinc.com>