target-xtensa: fix build for cores w/o windowed registers

Cores without windowed registers don't have window overflow/underflow
vectors. Move these vectors to a separate group defined conditionally.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
diff --git a/target-xtensa/overlay_tool.h b/target-xtensa/overlay_tool.h
index 5a1353e..6105d4c 100644
--- a/target-xtensa/overlay_tool.h
+++ b/target-xtensa/overlay_tool.h
@@ -108,20 +108,27 @@
 #define XCHAL_WINDOW_UF12_VECOFS        0x00000140
 #endif
 
+#if XCHAL_HAVE_WINDOWED
+#define WINDOW_VECTORS \
+   [EXC_WINDOW_OVERFLOW4] = XCHAL_WINDOW_OF4_VECOFS + \
+       XCHAL_WINDOW_VECTORS_VADDR, \
+   [EXC_WINDOW_UNDERFLOW4] = XCHAL_WINDOW_UF4_VECOFS + \
+       XCHAL_WINDOW_VECTORS_VADDR, \
+   [EXC_WINDOW_OVERFLOW8] = XCHAL_WINDOW_OF8_VECOFS + \
+       XCHAL_WINDOW_VECTORS_VADDR, \
+   [EXC_WINDOW_UNDERFLOW8] = XCHAL_WINDOW_UF8_VECOFS + \
+       XCHAL_WINDOW_VECTORS_VADDR, \
+   [EXC_WINDOW_OVERFLOW12] = XCHAL_WINDOW_OF12_VECOFS + \
+       XCHAL_WINDOW_VECTORS_VADDR, \
+   [EXC_WINDOW_UNDERFLOW12] = XCHAL_WINDOW_UF12_VECOFS + \
+       XCHAL_WINDOW_VECTORS_VADDR,
+#else
+#define WINDOW_VECTORS
+#endif
+
 #define EXCEPTION_VECTORS { \
         [EXC_RESET] = XCHAL_RESET_VECTOR_VADDR, \
-        [EXC_WINDOW_OVERFLOW4] = XCHAL_WINDOW_OF4_VECOFS + \
-            XCHAL_WINDOW_VECTORS_VADDR, \
-        [EXC_WINDOW_UNDERFLOW4] = XCHAL_WINDOW_UF4_VECOFS + \
-            XCHAL_WINDOW_VECTORS_VADDR, \
-        [EXC_WINDOW_OVERFLOW8] = XCHAL_WINDOW_OF8_VECOFS + \
-            XCHAL_WINDOW_VECTORS_VADDR, \
-        [EXC_WINDOW_UNDERFLOW8] = XCHAL_WINDOW_UF8_VECOFS + \
-            XCHAL_WINDOW_VECTORS_VADDR, \
-        [EXC_WINDOW_OVERFLOW12] = XCHAL_WINDOW_OF12_VECOFS + \
-            XCHAL_WINDOW_VECTORS_VADDR, \
-        [EXC_WINDOW_UNDERFLOW12] = XCHAL_WINDOW_UF12_VECOFS + \
-            XCHAL_WINDOW_VECTORS_VADDR, \
+        WINDOW_VECTORS \
         [EXC_KERNEL] = XCHAL_KERNEL_VECTOR_VADDR, \
         [EXC_USER] = XCHAL_USER_VECTOR_VADDR, \
         [EXC_DOUBLE] = XCHAL_DOUBLEEXC_VECTOR_VADDR, \