Copy Berry Fix MB dism from FR (#777)

* Copy Berry Fix MB dism from FR

berry_fix/payload/ld_script.sed

@@ -0,0 +1,14 @@
+/<EWRAM>/ {
+    r sym_ewram.ld
+    d
+}
+
+/<BSS>/ {
+    r sym_bss.ld
+    d
+}
+
+/<COMMON>/ {
+    r sym_common.ld
+    d
+}