arm: restore the VFP sigframe field fpscr properly

The routine restore_fpu() contains two bugs:

1) it reads more bytes from the array ThreadInfoArm::fpstate::vfp_regs
   than it actually containes;

2) the value of the field ThreadInfoArm::fpstate::fpscr is dropped
   on the floor.
Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

arch/arm/crtools.c

@@ -192,10 +192,9 @@ void arch_free_thread_info(CoreEntry *core)
 int restore_fpu(struct rt_sigframe *sigframe, CoreEntry *core)
 {
 	struct aux_sigframe *aux = (struct aux_sigframe *)&sigframe->sig.uc.uc_regspace;
-	fpu_state_t *fpu_state = &sigframe->fpu_state;
 
-	memcpy(&aux->vfp.ufp, CORE_THREAD_ARCH_INFO(core)->fpstate->vfp_regs, sizeof(aux->vfp.ufp));
-	fpu_state->ufp.fpscr = CORE_THREAD_ARCH_INFO(core)->fpstate->fpscr;
+	memcpy(&aux->vfp.ufp.fpregs, CORE_THREAD_ARCH_INFO(core)->fpstate->vfp_regs, sizeof(aux->vfp.ufp.fpregs));
+	aux->vfp.ufp.fpscr = CORE_THREAD_ARCH_INFO(core)->fpstate->fpscr;
 
 	return 0;
 }