uboot-imx

am335x_evm: Correct CONFIG_CMD_SPL_WRITE_SIZE

We use CONFIG_CMD_SPL_WRITE_SIZE when reading/writing the args portion
of falcon mode to NAND.  Previously it was half the size of the
eraseblock which is too small, increase to eraseblock size.

Signed-off-by: Tom Rini <trini@ti.com>