zorro: Refactor conditional handling of Zorro device name database

Using an empty static inline function in the CONFIG_ZORRO_NAMES=n case
allows to drop compilation of names.c.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --cc drivers/zorro/Makefile
Simple merge

diff --cc drivers/zorro/names.c
Simple merge

diff --cc drivers/zorro/zorro.h
Simple merge