isci: uplevel state machine

unify core/sci_base_state.h and core/sci_base_state_machine.[ch] into
state_machine.[ch]

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/host.h

@@ -59,7 +59,7 @@
 #include "remote_device.h"
 #include "phy.h"
 #include "pool.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "remote_node_table.h"
 #include "registers.h"
 #include "scu_unsolicited_frame.h"