TQM8xxL: make some room in low memory for future needs

THe TQM8xxL use a ahnd-optimized linker script to efficiently use the
small boot sectors in the flash. This patch makes some room in the
first sector to prepare for a size increase of lib_generic/vsprintf.o
by a future patch.

Signed-off-by: Wolfgang Denk <wd@denx.de>