ionic: Prevent driver/fw getting out of sync on devcmd(s)

Some stress/negative firmware testing around devcmd(s) returning
EAGAIN found that the done bit could get out of sync in the
firmware when it wasn't cleared in a retry case.

While here, change the type of the local done variable to a bool
to match the return type from ionic_dev_cmd_done().

Fixes: ec8ee714 ("ionic: stretch heartbeat detection")
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250609212827.53842-1-shannon.nelson@amd.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>