Added support to update UBI static volumes in barebox.
This is mainly realized with adding the ioctl UBI_IOCVOLUP.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

If there is more then one UBI device mounted, there is no way to
distinguish between messages from different UBI devices.
Add device number to all ubi layer message types.

The R/O block driver messages were replaced by pr_* since
ubi_device structure is not used by it.

Amended a bit by Artem.

Signed-off-by: Tanya Brokhman <tlinder@codeaurora.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

Conflicts:
	drivers/mtd/ubi/block.c
	drivers/mtd/ubi/build.c
	drivers/mtd/ubi/cdev.c
	drivers/mtd/ubi/debug.c
	drivers/mtd/ubi/fastmap.c
	drivers/mtd/ubi/io.c
	drivers/mtd/ubi/ubi.h
	drivers/mtd/ubi/vmt.c
	drivers/mtd/ubi/wl.c

Reworked it for barebox.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Our asprintf and vasprintf have different prototypes than the glibc
functions. This causes trouble when we want to share barebox code
with userspace code. Change the prototypes for (v)asprintf to match
the glibc prototypes. Since the current (v)asprintf are convenient
to use change the existing functions to b(v)asprintf.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

We want to extend the functionality of the ubi detach function,
but we don't want to change the original detach function to make
UBI updates easier. This adds a barebox specific detach function
which encapsulates the original UBI function. Also this makes the
original ubi detach function internal to ubi.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

cdev.c exists in the kernel UBI code, but barebox has completely
different content in this file. rename it to barebox.c to reduce the
number of merge conflicts. Also with the name barebox.c we now have
a place to put other barebox specific UBI code to.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>