EISA: Move devlist.h out of obj to always

EISA: Move devlist.h out of obj to always

I put devlist.h into the wrong Makefile macro ("obj") to get it included
in "targets". Put it into "always" so nothing tries to link against it.
Solves CONFIG_EISA=y i386 build failure:

ld: vmlinux.a: member drivers/eisa/devlist.h in archive is not an object

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Closes: https://lore.kernel.org/all/4a8ba1d0-d2d9-41f8-abf1-d45ec8996d10@infradead.org
Fixes: dd09eb0e2cc4 ("EISA: Increase length of device names")
Signed-off-by: Kees Cook <kees@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20250423023743.work.350-kees@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>