EISA: Increase length of device names

GCC 15's -Wunterminated-string-initialization warned about truncated
name strings. Instead of marking them with the "nonstring" attribute[1],
increase their length to correctly include enough space for the
terminating NUL character, as they are used with %s format specifiers
when showing resource allocations in /proc/ioports:

        seq_printf(m, "%*s%0*llx-%0*llx : %s\n", ..., r->name);

The strings in eisa.ids have a max length of 73, and the 50 limit was an
arbitrary limit that was removed back in 2008 with commit ca52a498
("driver core: remove DEVICE_NAME_SIZE define"). Change the limit to 74
so nothing is truncated any more.

Additionally fix the Makefile to use "if_changed" instead of "cmd"
to detect changes to the command line used to generate the target,
otherwise devlist.h won't be rebuilt.

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178

 [1]
Signed-off-by: Kees Cook <kees@kernel.org>
Acked-by: Alejandro Colomar <alx@kernel.org>
Link: https://lore.kernel.org/r/20250407172926.it.281-kees@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>