atmel-mci: fix initialization of 8bit-bus-width-mode for at91sam9g45 ...

When the bus_width was set to 8, then only one data-line has been initialized.

Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: add Atmel AT91 MCI driver ...

The driver supports push and pull transfers.
Tested on at91sam9m10 SoC.

Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com>

at91: Support for at91sam9g45 and at91sam9m10 series: core chip & board support ...

Here are the at91 specific files dedicated to the at91sam9g45 series. They
mimic the traditional at91 way of managing chips & boards.

The first board that embeds at91sam9g45 chip is the AT91SAM9M10G45-EK. In
the future, we will add the m10 and other boards revisions

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>