imx: imx6ul: kontron-sl-mx6ul: Fix CONFIG_ENV_SPI_BUS

The SPI NOR is on ECSPI1 so CONFIG_ENV_SPI_BUS should be 1
to detect the environment on the SPI NOR.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
1 file changed