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/Bananapi_defconfig b/configs/Bananapi_defconfig
index 904d27d..df74d03 100644
--- a/configs/Bananapi_defconfig
+++ b/configs/Bananapi_defconfig
@@ -6,4 +6,5 @@
 CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-bananapi"
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER,SUNXI_GMAC,RGMII,MACPWR=SUNXI_GPH(23),AHCI,USB_EHCI"
+CONFIG_CMD_SETEXPR=y
 CONFIG_ETH_DESIGNWARE=y