overlays/mtk: Add back Cadence-removed macro

See commit 7144272.

There is no "predicted branches" extension in any version of the
Xtensa ISA reference I have.  Newer versions of Cadence tooling have
removed (and presumably deprecated) this symbol, but binutils still
relies on seeing it (even just to evaluate to a zero to diable the
feature).

Really the proper fix would be to patch binutils upstream, but let's
have compatible headers here first.

Signed-off-by: Andrew Perepech <[email protected]>

Author: andrew-mtk

overlays/xtensa_mtk_mt8365_adsp/binutils/include/xtensa-config.h

@@ -187,3 +187,7 @@
 
 
 #endif /* !XTENSA_CONFIG_H */
+
+#ifndef XCHAL_HAVE_PREDICTED_BRANCHES
+#define XCHAL_HAVE_PREDICTED_BRANCHES 0 /* Needed by Zephyr SDK binutils */
+#endif

overlays/xtensa_mtk_mt8365_adsp/gcc/include/xtensa-config.h

@@ -187,3 +187,7 @@
 
 
 #endif /* !XTENSA_CONFIG_H */
+
+#ifndef XCHAL_HAVE_PREDICTED_BRANCHES
+#define XCHAL_HAVE_PREDICTED_BRANCHES 0 /* Needed by Zephyr SDK binutils */
+#endif

overlays/xtensa_mtk_mt8365_adsp/gdb/include/xtensa-config.h

@@ -187,3 +187,7 @@
 
 
 #endif /* !XTENSA_CONFIG_H */
+
+#ifndef XCHAL_HAVE_PREDICTED_BRANCHES
+#define XCHAL_HAVE_PREDICTED_BRANCHES 0 /* Needed by Zephyr SDK binutils */
+#endif