firmware: raspberrypi: Improve timeout warning

firmware: raspberrypi: Improve timeout warning

Recent work on raspberry-power driver showed that even the
stacktrace on firmware property timeout doesn't provide
enough information. So add the first tag name to the warning
to be in line with a status error.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20240728114200.75559-2-wahrenst@gmx.net
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>