overlays/mtk: Add "xtensa_rmap" alias

The name of this array changed in upstream bintuils commit
2b16913cdca2 ("gdb: make gdbarch_alloc take ownership of the tdep").

So far, the Zephyr SDK doesn't seem to want to use that version, but
add an alias so it builds with upstream crosstools-ng, and commit it
here as a reference if we want to port the other Xtensa overlays.

Signed-off-by: Andy Ross <[email protected]>

Author: andyross

overlays/xtensa_mtk_mt818x_adsp/gdb/gdb/xtensa-config.c

@@ -555,7 +555,7 @@ xtensa_register_t rmap[] =
   XTREG_END
 };
 
-
+extern xtensa_register_t xtensa_rmap[] __attribute__((alias("rmap")));
 
 #ifdef XTENSA_CONFIG_INSTANTIATE
 XTENSA_CONFIG_INSTANTIATE(rmap,16)

overlays/xtensa_mtk_mt8195_adsp/gdb/gdb/xtensa-config.c

@@ -496,4 +496,6 @@ static xtensa_register_t rmap[] =
   XTREG_END
 };
 
+extern xtensa_register_t xtensa_rmap[] __attribute__((alias("rmap")));
+
 xtensa_gdbarch_tdep xtensa_tdep (rmap);

overlays/xtensa_mtk_mt8196_adsp/gdb/gdb/xtensa-config.c

@@ -555,7 +555,7 @@ xtensa_register_t rmap[] =
   XTREG_END
 };
 
-
+extern xtensa_register_t xtensa_rmap[] __attribute__((alias("rmap")));
 
 #ifdef XTENSA_CONFIG_INSTANTIATE
 XTENSA_CONFIG_INSTANTIATE(rmap,16)