Kconfig: Migrate CONFIG_BAUDRATE

Move this in to Kconfig with a default of 115200.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[trini: Run moveconfig.py, reword commit slightly]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ms7750se_defconfig b/configs/ms7750se_defconfig
index d18640c..88bbb12 100644
--- a/configs/ms7750se_defconfig
+++ b/configs/ms7750se_defconfig
@@ -22,4 +22,5 @@
 # CONFIG_CMD_NFS is not set
 # CONFIG_CMD_MISC is not set
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_BAUDRATE=38400
 CONFIG_USE_PRIVATE_LIBGCC=y