lib: remove AVR32 entry in Kconfig.debug compile with frame pointers

AVR32 architecture has been removed from the Linux kernel sources, hence
clean up the architecture related symbols in lib/Kconfig.debug.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index fa16c0f..2598a32 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -356,7 +356,7 @@
 	bool "Compile the kernel with frame pointers"
 	depends on DEBUG_KERNEL && \
 		(CRIS || M68K || FRV || UML || \
-		 AVR32 || SUPERH || BLACKFIN || MN10300 || METAG) || \
+		 SUPERH || BLACKFIN || MN10300 || METAG) || \
 		ARCH_WANT_FRAME_POINTERS
 	default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
 	help