Recent changes caused that the spieval board now is included in the
boards built by MAKEALL, which revealed that compilation for this
board has been broken for a long time:
mpc5xxx_fec.c:899:2: error: #error fec->xcv_type not initialized.
mpc5xxx_fec.c:899:2: error: #error fec->xcv_type not initialized.
The board is orphaned.  Drop support for it.
Signed-off-by: Wolfgang Denk <wd@denx.de>
 v38b           powerpc mpc5xxx
 pf5200         powerpc mpc5xxx         -               esd
 aev            powerpc mpc5xxx         tqm5200         tqc
-spieval                powerpc mpc5xxx         tqm5200         tqc
 sorcery                powerpc mpc8220
 A3000          powerpc mpc824x         a3000
 barco          powerpc mpc824x