arch/Config.in.nds32: force syntax colouring to kconfig
It is too sad when an editor picks up the wrong syntax...
Like was done in e837837791 for all the other archs, force
syntax to kconfig for nds32 too.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Nylon Chen <nylon7@andestech.com>
Reviewed-by:Nylon Chen <nylon7@andestech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>