defconfig: Reorder boards' defconfig files

Some boards' defconfig files are out of order. Clean this up.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index 9ac43f0..6a38f98 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -3,13 +3,13 @@
 CONFIG_TARGET_AM3517_EVM=y
 CONFIG_SPL=y
 CONFIG_FIT=y
-CONFIG_SYS_PROMPT="AM3517_EVM # "
 CONFIG_SYS_EXTRA_OPTIONS="NAND"
+CONFIG_SYS_PROMPT="AM3517_EVM # "
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
-# CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_GPIO=y
+# CONFIG_CMD_SETEXPR is not set
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y