am b34d5d52: Use the TLS register if HAVE_ARM_TLS_REGISTER is defined

Merge commit 'b34d5d527596102ae7a040d787e4d8c336bf192b' into eclair-mr2

* commit 'b34d5d527596102ae7a040d787e4d8c336bf192b':
  Use the TLS register if HAVE_ARM_TLS_REGISTER is defined