[U-Boot] [PATCH v4 1/3] configs: at91sam9n12ek: Update for DT and DM support

[sjg at google.com]

Update the configuration files to support the device tree and driver
model. The device clock and pins configuration are handled by the
clock and the pinctrl drivers respectively.

Because the limitation of internal SRAM size, the SPL with driver
model can't be supported, disable the SPL option.

Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---

Changes in v4:
 - Adjust CONFIG_ENV_OFFSET for NAND to avoid the conflict caused
   by the increased binary size.

Changes in v3: None
Changes in v2:
 - Remain the SPI speed macros.
 - Disable the SPL option for the nand config.
 - Add support of Atmel uart be used in the board_init_f stage.
 - Improve the commit log.

 board/atmel/at91sam9n12ek/at91sam9n12ek.c |  2 ++
 configs/at91sam9n12ek_mmc_defconfig       | 19 ++++++++++++++++++-
 configs/at91sam9n12ek_nandflash_defconfig | 25 ++++++++++++++++++-------
 configs/at91sam9n12ek_spiflash_defconfig  | 26 ++++++++++++++++++--------
 include/configs/at91sam9n12ek.h           | 21 ++-------------------
 5 files changed, 58 insertions(+), 35 deletions(-)

Applied to u-boot-dm/next, thanks!