Add support for non-removable slots which have no card detection GPIO
and which should not be polled for a card change.
Signed-off-by: NTimo Kokkonen <timo.kokkonen@offcode.fi>
Acked-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>