drivers: of: import PCI bus specific translator ...

DT PCI address translation needs a special handling. This imports
the corresponding translator into of/address.c but makes it selectable
through Kconfig. Compared to the Linux version, we don't check for
struct device_node's type which does not exist on Barebox but directly
for device_type property set to "pci".

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

OF: convert of_translate_address to new API ...

This converts existing of_translate_address to recently added API. In
contrast to existing behavior, the new function honors ranges properties
properly. It now allows reg properties to be set as offset with respect
to the correspoding parent node.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

OF: import address related functions from Linux OF API ...

This imports drivers/of/address.c from Linux with some minor modifications.
of_translate_address is not yet enabled and PCI and ISA related bus translations
have not been imported. Also, a corresponding include header is created with
prototypes and non-OF function stubs.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>