First step cleaning up the drives handling.  This one does nothing but
removing drives_table[], still it became seriously big.

drive_get_index() is gone and is replaced by drives_get() which hands
out DriveInfo pointers instead of a table index.  This needs adaption in
*tons* of places all over.

The drives are now maintained as linked list.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

This reverts commit 8217606e (and
updates later added users of qemu_register_reset), we solved the
problem it originally addressed less invasively.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Provide a petalogix-s3adsp1800.dtb blob.
Correct loading of the petalogix dtb.
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

If libfdt is not available, disable the fdt manipulation features.
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

This setup was designed by petalogix and is supported by upstream linux.
The design targets a xilinx spartan-3a-1800 dsp board with MMU.
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>