Revert "dt: add of_alias_scan and of_alias_get_id"

This reverts commit 750f463a749e28464151ad26938d11b07b1c43cb.

of_alias_* still needs work to be generalized for 'promtree' dt
platforms, and to no implicitly create entries for available ids.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --cc drivers/of/base.c
Simple merge

diff --cc drivers/of/fdt.c
Simple merge

diff --cc include/linux/of.h
Simple merge

diff --cc include/linux/of_fdt.h
Simple merge