Re: libfdt: Add functions for handling the "compatible" property

So, like, the other day David Gibson mumbled:

This patch adds functions for dealing with the compatible property.
fdt_node_check_compatible() can be used to determine whether a node is
compatible with a given string and fdt_node_offset_by_compatible()
locates nodes with a given compatible string.

Testcases for these functions are also included.

Signed-off-by: David Gibson <redacted>

Applied.

jdl