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>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index ab8dfbe..d63719c 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -303,7 +303,7 @@
 config SPI_FSL_DSPI
 	tristate "Freescale DSPI controller"
 	select REGMAP_MMIO
-	depends on SOC_VF610 || COMPILE_TEST
+	depends on SOC_VF610 || SOC_LS1021A || COMPILE_TEST
 	help
 	  This enables support for the Freescale DSPI controller in master
 	  mode. VF610 platform uses the controller.