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/socfpga_arria5_defconfig b/configs/socfpga_arria5_defconfig
index f682492..06cedaf 100644
--- a/configs/socfpga_arria5_defconfig
+++ b/configs/socfpga_arria5_defconfig
@@ -3,5 +3,6 @@
 CONFIG_TARGET_SOCFPGA_ARRIA5=y
 CONFIG_DEFAULT_DEVICE_TREE="socfpga_arria5_socdk"
 CONFIG_SPL=y
+CONFIG_CMD_SETEXPR=y
 CONFIG_OF_CONTROL=y
 CONFIG_REGEX=y