cnss2: Set debug state when using debugfs dev_boot node

When using debugfs dev_boot node to trigger firmware download,
debug state should be set as well so that subsequence shutdown
and powerup can be handled correctly.

Change-Id: Id85d28dca104f8938d78655d682a0a7d1491c04c
CRs-fixed: 2059087
Signed-off-by: Yue Ma <yuem@codeaurora.org>