configs: ls1046a: Move SPI_FLASH_SPANSION to defconfig

Enable CONFIG_SPI_FLASH_SPANSION in defconfigs of LS1046ARDB and
LS1046AQDS which have two spansion flases i.e s25fs512s each of size
64M.

Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/ls1046ardb_tfa_defconfig b/configs/ls1046ardb_tfa_defconfig
index eab34cd..0185d8c 100644
--- a/configs/ls1046ardb_tfa_defconfig
+++ b/configs/ls1046ardb_tfa_defconfig
@@ -42,6 +42,7 @@
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y
 # CONFIG_SPI_FLASH_BAR is not set
+CONFIG_SPI_FLASH_SPANSION=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_PHYLIB=y
 CONFIG_PHY_AQUANTIA=y