ide: re-add TRM290 fix lost during ide_build_dmatable() cleanup

commit 14c123f3 ("ide: cleanup
ide_build_dmatable()") accidentally reverted TRM290 fix introduced
by commit 22e05b45

 ("ide-dma: fix
ide_build_dmatable() for TRM290").

Reported-by: Sergei Shtylylov <sshtylyov@ru.mvista.com>
Acked-by: Sergei Shtylylov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>