Convert CONFIG_FSL_QIXIS et al to Kconfig

This converts the following to Kconfig:
   CONFIG_FSL_QIXIS
   CONFIG_QIXIS_I2C_ACCESS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ls1021aqds_nand_defconfig b/configs/ls1021aqds_nand_defconfig
index 33d37db29..79e8fbb 100644
--- a/configs/ls1021aqds_nand_defconfig
+++ b/configs/ls1021aqds_nand_defconfig
@@ -16,6 +16,8 @@
 CONFIG_DEFAULT_DEVICE_TREE="ls1021a-qds-duart"
 CONFIG_SPL_TEXT_BASE=0x10000000
 CONFIG_FSL_USE_PCA9547_MUX=y
+CONFIG_FSL_QIXIS=y
+# CONFIG_QIXIS_I2C_ACCESS is not set
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL=y