Use the max_rom_decode infrastructure for wbsio_spi

Use this instead of the open-coding variant that only aborts after it is too late.

Corresponding to flashrom svn r1081.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
3 files changed