lx2160a: Enable CONFIG_SPI_FLASH_MT35XU for lx2160a-rdb/qds

LX2160A-RDB/QDS has micron mt35xu512aba flash which requires flag
CONFIG_SPI_FLASH_MT35XU on to probe flash successfully.

Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/lx2160aqds_tfa_SECURE_BOOT_defconfig b/configs/lx2160aqds_tfa_SECURE_BOOT_defconfig
index ed4304c..91fba19 100644
--- a/configs/lx2160aqds_tfa_SECURE_BOOT_defconfig
+++ b/configs/lx2160aqds_tfa_SECURE_BOOT_defconfig
@@ -51,6 +51,7 @@
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH_EON=y
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_MT35XU=y
 CONFIG_SPI_FLASH_SST=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_PHYLIB=y