PM / PM QoS: Fix reversed min and max

pm_qos_get_value had min and max reversed, causing all pm_qos
requests to have no effect.

Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: mark <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org