PNP: Expand length of fixup id string

GCC 15's -Wunterminated-string-initialization saw that "id" was not
including the required trailing NUL character. Instead of marking "id"
with __nonstring[1], expand the length of the string as it is used in
(debugging) format strings that expect a properly formed C string.

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178 [1]
Signed-off-by: Kees Cook <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Rafael J. Wysocki <[e-mail]>

include/linux/pnp.h

···
 }
 
 struct pnp_fixup {
-	char id[7];
+	char id[8];
 	void (*quirk_function) (struct pnp_dev *dev);	/* fixup function */
 };