README: document CONFIG_ENV_IS_IN_SPI_FLASH
authorWu, Josh <Josh.wu@atmel.com>
Tue, 1 Jul 2014 11:30:13 +0000 (19:30 +0800)
committerTom Rini <trini@ti.com>
Mon, 7 Jul 2014 23:43:01 +0000 (19:43 -0400)
commitbd83b5921201a61eb74ed7faa04c3f237d5323a2
tree0f3a924e4cbb4fc7be45d8bcb4de8dda3d72ed71
parentbe354c1a214daeedb24d7716308432f188d0004c
README: document CONFIG_ENV_IS_IN_SPI_FLASH

The option can be used to save the environment in spi flash.
Implementation code is already exist in command/env_sf.c. But
the documentation is missing.

This patch add the details for this option to the README file.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
README