Rework RAM disk driver to be configured using devicetree and
support multiple instances.
This patch also removes a copy of the RAM disk driver,
tests/subsys/fs/fat_fs_dual_drive/src/disk_access_test_drv.c,
that was there for testing multiple disk drivers support.
Bonus: one SYS_INIT() less and a memory region can be exported to the
host.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
On Qemu x86_64 it is possible to emulate an NVMe controller and disk on
the PCIe bus, so let's add this case here to verify that the newly added
NVMe controller and disk driver works fine.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
