arm: Clean up MACH_TYPE_xxx usage after re-sync of mach-types

With the latest mach-types values we have many instances where we no
longer need to define a value and a few cases where the name (but not
value) have changed slightly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/Seagate/nas220/nas220.c b/board/Seagate/nas220/nas220.c
index d9a0627..c5349b9 100644
--- a/board/Seagate/nas220/nas220.c
+++ b/board/Seagate/nas220/nas220.c
@@ -75,7 +75,7 @@
 	/*
 	 * arch number of board
 	 */
-	gd->bd->bi_arch_number = MACH_TYPE_NAS220;
+	gd->bd->bi_arch_number = MACH_TYPE_RD88F6192_NAS;
 
 	/* adress of boot parameters */
 	gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;