one more fix of binutils config for AVR32 toolchain

toolchain/binutils/Config.in

@@ -11,11 +11,11 @@ choice
 	config BR2_BINUTILS_VERSION_2_17
 		depends on !BR2_avr32 && !BR2_nios2
 		depends on BR2_DEPRECATED
-		depends on BR2_EXT_BINUTILS_VERSION_2_17
 		bool "binutils 2.17"
 
 	config BR2_BINUTILS_VERSION_2_17
 		depends on BR2_avr32
+		depends on BR2_EXT_BINUTILS_VERSION_2_17
 		bool "binutils 2.17"
 
 	config BR2_BINUTILS_VERSION_2_17_50_0_17