This should be a good first step to allow multi-driver targets, like the Elio (ATA/SD), or the D2 (NAND/SD). git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18960 a1c6a512-1295-4272-9138-f99709370657
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18544 a1c6a512-1295-4272-9138-f99709370657