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/ls1028aqds_tfa_lpuart_defconfig b/configs/ls1028aqds_tfa_lpuart_defconfig
index e692004..7531644 100644
--- a/configs/ls1028aqds_tfa_lpuart_defconfig
+++ b/configs/ls1028aqds_tfa_lpuart_defconfig
@@ -10,6 +10,7 @@
 CONFIG_ENV_SECT_SIZE=0x20000
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1028a-qds-lpuart"
+CONFIG_FSL_QIXIS=y
 CONFIG_FSPI_AHB_EN_4BYTE=y
 CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT=y
 CONFIG_SEC_FIRMWARE_ARMV8_PSCI=y