tile: switch to generic sys_execve()

Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
index 9a83e53..879073e 100644
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@@ -211,6 +211,7 @@
 {
 	regs->pc = pc;
 	regs->sp = usp;
+	single_step_execve();
 }
 
 /* Free all resources held by a thread. */