spi: Kconfig: Add SOC_LS1021A to SPI_FSL_DSPI dependence

LS1021A chip also has the DSPI module.
Add it to the dependence.

Signed-off-by: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
1 file changed