armv8: ls1088: Move CONFIG_ENV_IS_IN_SPI_FLASH to defconfig

Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/configs/ls1088aqds_qspi_defconfig b/configs/ls1088aqds_qspi_defconfig
index 6a542ed..b4e1c98 100644
--- a/configs/ls1088aqds_qspi_defconfig
+++ b/configs/ls1088aqds_qspi_defconfig
@@ -30,3 +30,4 @@
 CONFIG_DM_SPI=y
 CONFIG_FSL_DSPI=y
 CONFIG_EFI_LOADER_BOUNCE_BUFFER=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y