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/glacier_ramboot_defconfig b/configs/glacier_ramboot_defconfig
index 98bcaf4..26bee7d 100644
--- a/configs/glacier_ramboot_defconfig
+++ b/configs/glacier_ramboot_defconfig
@@ -4,5 +4,6 @@
 CONFIG_GLACIER=y
 CONFIG_DEFAULT_DEVICE_TREE="glacier"
 CONFIG_SYS_EXTRA_OPTIONS="SYS_RAMBOOT,SYS_TEXT_BASE=0x01000000,SYS_LDSCRIPT=board/amcc/canyonlands/u-boot-ram.lds"
+CONFIG_CMD_SETEXPR=y
 CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y