arm: NPTL on noMMU only for FDPIC

target/config/Config.in.threads

@@ -8,7 +8,7 @@ depends on ADK_TARGET_LIB_UCLIBC_NG
 config ADK_TARGET_WITH_NPTL
 	bool "NPTL"
 	depends on ADK_TARGET_SUPPORTS_NPTL && ADK_TARGET_SUPPORTS_THREADS && \
-	(ADK_TARGET_ARCH_ARM || ADK_TARGET_WITH_MMU)
+	((ADK_TARGET_ARCH_ARM && ADK_TARGET_BINFMT_FDPIC) || ADK_TARGET_WITH_MMU)
 
 config ADK_TARGET_WITH_LT
 	bool "Linuxthreads"