configs: icore-rqs: Enable falcon mode

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

configs/imx6qdl_icore_rqs_defconfig

@@ -16,6 +16,7 @@ CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg"
 CONFIG_BOOTDELAY=3
 CONFIG_SPL=y
 CONFIG_SPL_EXT_SUPPORT=y
+CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="icorem6qdl-rqs> "
 CONFIG_CRC32_VERIFY=y