Remove exit() call from show_id

The only caller is able to check the return code and handle it
correctly.

Corresponding to flashrom svn r1545.

Signed-off-by: Niklas Söderlund <niso@kth.se>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

layout.c

@@ -137,7 +137,7 @@ int show_id(uint8_t *bios, int size, int force)
 				  "\n\n",
 				  mainboard_vendor, mainboard_part, lb_vendor,
 				  lb_part);
-			exit(1);
+			return 1;
 		}
 	}