clocksource: Use a plain u64 instead of cycle_t

There is no point in having an extra type for extra confusion. u64 is
unambiguous.

Conversion was done with the following coccinelle script:

@rem@
@@
-typedef u64 cycle_t;

@fix@
typedef cycle_t;
@@
-cycle_t
+u64

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index c30eea8..c447755 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -77,7 +77,7 @@
 static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter);
 
 /* SYSTIM read access for the 82576 */
-static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc)
+static u64 igb_ptp_read_82576(const struct cyclecounter *cc)
 {
 	struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc);
 	struct e1000_hw *hw = &igb->hw;
@@ -94,7 +94,7 @@ static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc)
 }
 
 /* SYSTIM read access for the 82580 */
-static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc)
+static u64 igb_ptp_read_82580(const struct cyclecounter *cc)
 {
 	struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc);
 	struct e1000_hw *hw = &igb->hw;