kbuild: remove obj-n and lib-n handling
Masahiro Yamada authored

Kconfig never defines CONFIG_* as 'n'.
Now obj-n is only used in firmware/Makefile and it can be
replaced with obj-.  No makefile uses lib-n.

Let's rip off obj-n and lib-n.
Signed-off-by: default avatarMasahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: default avatarPeter Foley <pefoley2@pefoley.com>
Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
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