The SPI flash driver does not build without SPI support enabled.
Fixes: 4151f4f822bb ("spl: Rework and tighten some dependencies") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Acked-by: Peng Fan <peng.fan@nxp.com> Acked-by: Anshul Dalal <anshuld@ti.com>