[U-Boot] ARM: at91: trival: fix typo for the nand partition name

[Andreas Bießmann]

Dear "Wu, Josh",

Josh Wu <Josh.wu at atmel.com> writes:
>We should use 'env' to present environment instead of 'evn'
>
>Signed-off-by: Josh Wu <josh.wu at atmel.com>
>---
>
> include/configs/at91-sama5_common.h | 2 +-
> include/configs/at91sam9rlek.h      | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)

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

Best regards,
Andreas Bießmann