MPC8xx: Make SPD823TS board build again

Commit e59e3562 "TFTP: net/tftp.c: add server mode receive" caused the
size of some object files to grow which breaks the manually optimized
linking for the SPD823TS board.  Adjust linker script as needed.

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

board/spd8xx/u-boot.lds

@@ -36,7 +36,6 @@ SECTIONS
     arch/powerpc/cpu/mpc8xx/traps.o	(.text*)
     net/libnet.o			(.text*)
     arch/powerpc/cpu/mpc8xx/libmpc8xx.o	(.text*)
-    board/spd8xx/libspd8xx.o		(.text*)
     *(.text.v*printf)
 
     . = DEFINED(env_offset) ? env_offset : .;