toolchain: enable musl for aarch64

musl 1.1.7 brings in experimental aarch64 support so enable it.
Tested via qemu_aarch64_virt_defconfig.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

toolchain/toolchain-buildroot/Config.in

@@ -83,8 +83,9 @@ comment "(e)glibc only available with shared lib support"
 
 config BR2_TOOLCHAIN_BUILDROOT_MUSL
 	bool "musl (experimental)"
-	depends on BR2_arm || BR2_armeb || BR2_i386 || BR2_microblaze || \
-		BR2_mips || BR2_mipsel || BR2_powerpc || BR2_x86_64
+	depends on BR2_aarch64 || BR2_arm || BR2_armeb || BR2_i386 || \
+		BR2_microblaze || BR2_mips || BR2_mipsel || BR2_powerpc || \
+		BR2_x86_64
 	depends on !BR2_powerpc_SPE # not supported, build breaks
 	select BR2_TOOLCHAIN_USES_MUSL
 	help