m68k: M54418TWR: drop board/freescale/m54418twr/config.mk
The board/freescale/m54418twr/config.mk defined TEXT_BASE, which has
the same value as CONFIG_SYS_TEXT_BASE. The TEXT_BASE is referenced
by two files:
- arch/m68k/cpu/mcf5445x/start.S and include/
- include/configs/M54418TWR.h
Replace the references with CONFIG_SYS_TEXT_BASE and delete
board/freescale/m54418twr/config.mk.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Angelo Dureghello <angelo at sysam.it>