[U-Boot] arm: atmel: add nand trimffs subcommand for at91sam9n12 and at91sam9x5

[Andreas Bießmann]

Dear Bo Shen,

Bo Shen <voice.shen at atmel.com> writes:
>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 at atmel.com>
>
>---
>include/configs/at91sam9n12ek.h |    3 +++
> include/configs/at91sam9x5ek.h  |    2 ++
> 2 files changed, 5 insertions(+)

applied to u-boot-atmel/master, thanks!

Best regards,
Andreas Bießmann