arm: Note vendor-required status of certain MACH_TYPE values

In the cases of some boards, a MACH_TYPE number is used which is either
not registered upstream or worse (for functionality) is re-using the
number of a different (or reference) platform instead.  Make sure we
have a comment in these cases.

Cc: Albert ARIBAUD <albert.aribaud@3adev.fr>
Cc: Walter Schweizer <swwa@users.sourceforge.net>
Cc: Stefan Roese <sr@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/work_92105.h b/include/configs/work_92105.h
index 4ce8b09..dd02142 100644
--- a/include/configs/work_92105.h
+++ b/include/configs/work_92105.h
@@ -18,8 +18,7 @@
  * Define work_92105 machine type by hand -- done only for compatibility
  * with original board code
  */
-#define MACH_TYPE_WORK_92105		736
-#define CONFIG_MACH_TYPE		MACH_TYPE_WORK_92105
+#define CONFIG_MACH_TYPE		736
 
 #define CONFIG_SYS_ICACHE_OFF
 #define CONFIG_SYS_DCACHE_OFF