Unset HAVE_TLS_REGISTER for ARMv5

Bug: 5763261
Change-Id: I0394daa4cdbad598b91a99e54ca5f830e9ee940b
diff --git a/target/board/generic_armv5/BoardConfig.mk b/target/board/generic_armv5/BoardConfig.mk
index d8fa2fe..82170f0 100644
--- a/target/board/generic_armv5/BoardConfig.mk
+++ b/target/board/generic_armv5/BoardConfig.mk
@@ -19,5 +19,6 @@
 TARGET_ARCH_VARIANT :=
 TARGET_CPU_ABI := armeabi
 TARGET_CPU_ABI2 :=
+ARCH_ARM_HAVE_TLS_REGISTER := false
 
 WITH_DEXPREOPT := false