microblaze: Rename global function heartbeat()

microblaze:allmodconfig complains for some configurations that 'heartbeat'
is redefined as different kind of symbol. This is seen in test compiles
of watchdog drivers, which often use 'heartbeat' as ststic variable.

Since 'heartbeat' is an unfortunate name for a global function,
rename it to microblaze_heartbeat. Also rename the setup function
to microblaze_setup_heartbeat.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/include/asm/setup.h

@@ -25,8 +25,8 @@ int setup_early_printk(char *opt);
 void remap_early_printk(void);
 void disable_early_printk(void);
 
-void heartbeat(void);
-void setup_heartbeat(void);
+void microblaze_heartbeat(void);
+void microblaze_setup_heartbeat(void);
 
 #   ifdef CONFIG_MMU
 extern void mmu_reset(void);

arch/microblaze/kernel/heartbeat.c

@@ -17,7 +17,7 @@
 
 static unsigned int base_addr;
 
-void heartbeat(void)
+void microblaze_heartbeat(void)
 {
 	static unsigned int cnt, period, dist;
 
@@ -42,7 +42,7 @@ void heartbeat(void)
 	}
 }
 
-void setup_heartbeat(void)
+void microblaze_setup_heartbeat(void)
 {
 	struct device_node *gpio = NULL;
 	int *prop;

arch/microblaze/kernel/timer.c

@@ -140,7 +140,7 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
 	struct clock_event_device *evt = &clockevent_xilinx_timer;
 #ifdef CONFIG_HEART_BEAT
-	heartbeat();
+	microblaze_heartbeat();
 #endif
 	timer_ack();
 	evt->event_handler(evt);
@@ -274,7 +274,7 @@ static void __init xilinx_timer_init(struct device_node *timer)
 
 	setup_irq(irq, &timer_irqaction);
 #ifdef CONFIG_HEART_BEAT
-	setup_heartbeat();
+	microblaze_setup_heartbeat();
 #endif
 	xilinx_clocksource_init();
 	xilinx_clockevent_init();