ARM: clean up TWD after previous patch

Rename feat_c3stop to twd_features to match the other variables in this
file.  Initialise it with the standard features that we always support,
and arrange to set the CLOCK_EVT_FEAT_C3STOP when appropriate.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/smp_twd.c

@@ -33,7 +33,8 @@ static unsigned long twd_timer_rate;
 static DEFINE_PER_CPU(bool, percpu_setup_called);
 
 static struct clock_event_device __percpu *twd_evt;
-static int feat_c3stop;
+static unsigned int twd_features =
+		CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
 static int twd_ppi;
 
 static int twd_shutdown(struct clock_event_device *clk)
@@ -294,8 +295,7 @@ static void twd_timer_setup(void)
 	writel_relaxed(0, twd_base + TWD_TIMER_CONTROL);
 
 	clk->name = "local_timer";
-	clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
-			feat_c3stop;
+	clk->features = twd_features;
 	clk->rating = 350;
 	clk->set_state_shutdown = twd_shutdown;
 	clk->set_state_periodic = twd_set_periodic;
@@ -351,7 +351,7 @@ static int __init twd_local_timer_common_register(struct device_node *np)
 
 	twd_get_clock(np);
 	if (!of_property_read_bool(np, "always-on"))
-		feat_c3stop = CLOCK_EVT_FEAT_C3STOP;
+		twd_features |= CLOCK_EVT_FEAT_C3STOP;
 
 	/*
 	 * Immediately configure the timer on the boot CPU, unless we need