Move LDSCRIPT definitions to board config files.

Recent cleanup actions resulted in a number of config.mk files that
contained only LDSCRIPT definitions.  Move these into th respective
board config files and remove the now empty config.mk files.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Andre Schwarz <andre.schwarz@matrix-vision.de>
Cc: Peter De Schrijver <p2@mind.be>
Acked-by: Detlev Zundel &lt; <dzu@denx.de>
Acked-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Acked-by: Heiko <Schocher&lt;hs@denx.de>
Acked-by: Matthias Fuchs <matthias.fuchs@esd.eu>