arm: at91sam9n12: change EBI IO to high drive mode

As both the DDR SDRAM and NAND flash connect to EBI on at91sam9n12
and share the lower 8 bits data line. If use low drive of the data
line, it will cause DDR data access corrupt in lower address, so
change the data line to high drive mode

This will fix the Linux kernel boot issue when use Lower address

Signed-off-by: Bo Shen <voice.shen@atmel.com>
net: ks8851_mll: add ethernet support

The device interface is 16 bits wide.
All the available packets are read from the incoming fifo.

Signed-off-by: Roberto Cerati <roberto.cerati@bticino.it>
Signed-off-by: Raffaele Recalcati <raffaele.recalcati@bticino.it>
[voice.shen@atmel.com: address comments from review results]
[voice.shen@atmel.com: clean up for submit]
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Tested-by: Raffaele Recalcati <raffaele.recalcati@bticino.it>
ARM: at91sam9n12: add network support with ksz8851_16mll

add network support with ksz8851_16mll on at91sam9n12ek board

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
arm: atmel: add nand trimffs subcommand for at91sam9n12 and at91sam9x5

as the at91sam9n12 and at91sam9x5 soc support PMECC, when use u-boot
to flash the rootfs, in order to avoid flash one sector with all 0xff
into NAND, so use nand trimffs subcommand to avoid it

Signed-off-by: Bo Shen <voice.shen@atmel.com>