linux-imx

mmc: tmio: document CTL_STATUS handling

Now that reading CTL_STATUS is consistent, we can remove CTL_STATUS2 and
document how this is handled internally.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>