treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: dove: fix dereference of nullable pointer ...

data->{blocks, blocksize, flags} are all used outside of the if clause
checking whether data is not NULL.
Fix this to avoid dereferencing null pointers.

Fixes: bdcf89d274 ("mci: add Marvell Dove SDHCI driver")
Cc: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: dove: Use sdhci_set_cmd_xfer_mode() ...

Use sdhci_set_cmd_xfer_mode() to share more code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: dove: use sdhci helpers ...

To use the sdhci helpers we have to switch to the sdhci accessors.
Also use sdhci_read_response().

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: add Marvell Dove SDHCI driver ...

This adds a driver for the SDHCI controller found on Marvell Dove SoCs.
Despite a missing pinctrl driver, corresponding MPP config has to be
set on a per board basis.

This driver was succesfully tested with Solidrun Dove Cubox.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>