adds some consistency fixes for variable ISA settings

bare-metal-bsp/env/iss/link.lds

@@ -4,7 +4,7 @@ ENTRY( _start )
 
 MEMORY
 {
-  flash (rxai!w) : ORIGIN = 0x00000020, LENGTH = 1M
+  flash (rxai!w) : ORIGIN = 0x00000000, LENGTH = 1M
   ram (wxa!ri) :   ORIGIN = 0x10000000, LENGTH = 16K
 }