ARM: dts: aspeed: palmetto: Fix flash_memory region

The flash_memory region was incorrect and exceeds AST2400's RAM range.
Fix it by putting it before coldfire region, and aligned with 32MiB.

Signed-off-by: Lei YU <[e-mail]>
Acked-by: Andrew Jeffery <[e-mail]>
Signed-off-by: Joel Stanley <[e-mail]>

arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts

···
 			no-map;
 		};
 
-		flash_memory: region@98000000 {
+		flash_memory: region@5c000000 {
 			no-map;
-			reg = <0x98000000 0x01000000>; /* 16MB */
+			reg = <0x5C000000 0x02000000>; /* 32MB */
 		};
 	};