The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu. Use hierarchic menu for each category.
Signed-off-by: Masahiro Yamada <firstname.lastname@example.org>
Reviewed-by: Simon Glass <email@example.com>
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: Tom Rini <firstname.lastname@example.org>