Update config files (bsc#1179102).
    
    Set AMIGA_PARTITION=y wherever AFFS_FS=m. The AMIGA_PARTITION's Kconfig
    help suggests: default y if (AMIGA || AFFS_FS=y). And we enable Amiga FS
    in some configs, but don't enable support for Amiga partitions. That is
    a bit pointless. So fix this.