arc: disable Crosstool-NG for ARC

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

toolchain/Config.in

@@ -22,7 +22,7 @@ config BR2_TOOLCHAIN_EXTERNAL
 
 config BR2_TOOLCHAIN_CTNG
 	bool "Crosstool-NG toolchain"
-	depends on !BR2_microblaze && !BR2_aarch64 && !BR2_xtensa
+	depends on !BR2_microblaze && !BR2_aarch64 && !BR2_xtensa && !BR2_arc
 	select BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS
 	help
 	  Say 'y' if you want to generate the toolchain with crosstool-NG