This is a straight and complete copy of sdbfs/lib from the
fpga-config-space project (ohwr.org).  The last sdbfs commit in there
as I pick this is d37e888.

Further commits in sdb-lib within wrpc-sw are expected to exactly
track fpga-config-space (and report the upstream commit), to avoid
maintainance issues.  However, I prefer not to have a submodule since
it makes things difficult for such a small code subset.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

sdb-lib/access.c: FIXUP --> fpga-config-space
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

sdb-lib:FIXUP -> fpga-config-s-ace
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

SDB-LIB: fix missing ->read (fppa-c-space)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

SDBLIB: buffer is void
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>