uclibc-ng: disable thread support for upcoming aarch64 support

target/config/Config.in.cpu

@@ -8,16 +8,20 @@ prompt "CPU" if !ADK_TARGET_CHOOSE_ARCH
 config ADK_TARGET_CPU_AARCH64_CORTEX_A53
         bool "cortex-a53"
 	select ADK_LINUX_64
-	select ADK_TARGET_SUPPORTS_THREADS
-	select ADK_TARGET_SUPPORTS_NPTL
+	select ADK_TARGET_SUPPORTS_THREADS if ADK_TARGET_LIB_MUSL
+	select ADK_TARGET_SUPPORTS_THREADS if ADK_TARGET_LIB_GLIBC
+	select ADK_TARGET_SUPPORTS_NPTL if ADK_TARGET_LIB_MUSL
+	select ADK_TARGET_SUPPORTS_NPTL if ADK_TARGET_LIB_GLIBC
 	select ADK_TARGET_WITH_MMU
 	depends on ADK_TARGET_ARCH_AARCH64
 
 config ADK_TARGET_CPU_AARCH64_CORTEX_A57
         bool "cortex-a57"
 	select ADK_LINUX_64
-	select ADK_TARGET_SUPPORTS_THREADS
-	select ADK_TARGET_SUPPORTS_NPTL
+	select ADK_TARGET_SUPPORTS_THREADS if ADK_TARGET_LIB_MUSL
+	select ADK_TARGET_SUPPORTS_THREADS if ADK_TARGET_LIB_GLIBC
+	select ADK_TARGET_SUPPORTS_NPTL if ADK_TARGET_LIB_MUSL
+	select ADK_TARGET_SUPPORTS_NPTL if ADK_TARGET_LIB_GLIBC
 	select ADK_TARGET_WITH_MMU
 	depends on ADK_TARGET_ARCH_AARCH64