Further merge drivers by using the same command and data functions.
No use one mutex per drive instead of a global sd lock. Fix the
RCA handling which was different between SD and MMC (shifted 16)
and thus confusing. Add MMC commands definition to the mmc.h
header similarly to the SD one. Change MMC handling a bit by
selecting/deselecting on each transfer like SD, which allows
for several MMC devices in theory and is more uniform.
Change-Id: I7024cb19c079553806138ead75b00640f1d2d95c
After a discussion mixed on mailing list and irc, it was agreed that
more abstraction for plugins is better (so developers don't have to add
a check to HAVE_DISK_STORAGE when writing disk-specific code)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21923 a1c6a512-1295-4272-9138-f99709370657
storage_sleep, storage_spin, storage_spindown are only defined if #defiend (HAVE_DISK_STORAGE), not for MMC/ATA/SD
remove already unneeded nand_disk_is_active, nand_soft_reset
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21912 a1c6a512-1295-4272-9138-f99709370657
