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/arches_defconfig b/configs/arches_defconfig
index 9084a3a..7b1eda8 100644
--- a/configs/arches_defconfig
+++ b/configs/arches_defconfig
@@ -3,4 +3,5 @@
 CONFIG_TARGET_CANYONLANDS=y
 CONFIG_ARCHES=y
 CONFIG_DEFAULT_DEVICE_TREE="arches"
+CONFIG_CMD_SETEXPR=y
 CONFIG_OF_CONTROL=y