Move setexpr to Kconfig

Another shell scripting command that has not been moved.

Moved using tools/moveconfig.py using these settings:

CMD_SETEXPR bool n y

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/configs/gwventana_defconfig b/configs/gwventana_defconfig
index 2d6552f..898b3c5 100644
--- a/configs/gwventana_defconfig
+++ b/configs/gwventana_defconfig
@@ -2,6 +2,7 @@
 CONFIG_TARGET_GW_VENTANA=y
 CONFIG_SYS_MALLOC_F=y
 CONFIG_SPL=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,MX6QDL"
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_ADDR=0x18000000
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,MX6QDL"
+CONFIG_CMD_SETEXPR=y