ARM: at91: PIT: Use pr_fmt

All the panic messages hardcode the same prefix. Define the pr_fmt macro to
unify its definition.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/at91sam926x_time.c

@@ -10,6 +10,8 @@
  * published by the Free Software Foundation.
  */
 
+#define pr_fmt(fmt)	"AT91: PIT: " fmt
+
 #include <linux/clk.h>
 #include <linux/clockchips.h>
 #include <linux/interrupt.h>
@@ -208,7 +210,7 @@ static void __init at91sam926x_pit_common_init(void)
 	/* Set up irq handler */
 	ret = setup_irq(at91sam926x_pit_irq.irq, &at91sam926x_pit_irq);
 	if (ret)
-		panic("AT91: PIT: Unable to setup IRQ\n");
+		panic(pr_fmt("Unable to setup IRQ\n"));
 
 	/* Set up and register clockevents */
 	pit_clkevt.mult = div_sc(pit_rate, NSEC_PER_SEC, pit_clkevt.shift);
@@ -222,7 +224,7 @@ static void __init at91sam926x_pit_dt_init(struct device_node *node)
 
 	pit_base_addr = of_iomap(node, 0);
 	if (!pit_base_addr)
-		panic("AT91: PIT: Could not map PIT address\n");
+		panic(pr_fmt("Could not map PIT address\n"));
 
 	mck = of_clk_get(node, 0);
 	if (IS_ERR(mck))
@@ -230,12 +232,12 @@ static void __init at91sam926x_pit_dt_init(struct device_node *node)
 		mck = clk_get(NULL, "mck");
 
 	if (IS_ERR(mck))
-		panic("AT91: PIT: Unable to get mck clk\n");
+		panic(pr_fmt("Unable to get mck clk\n"));
 
 	/* Get the interrupts property */
 	irq = irq_of_parse_and_map(node, 0);
 	if (!irq)
-		panic("AT91: PIT: Unable to get IRQ from DT\n");
+		panic(pr_fmt("Unable to get IRQ from DT\n"));
 
 	at91sam926x_pit_irq.irq = irq;
 
@@ -248,7 +250,7 @@ void __init at91sam926x_pit_init(void)
 {
 	mck = clk_get(NULL, "mck");
 	if (IS_ERR(mck))
-		panic("AT91: PIT: Unable to get mck clk\n");
+		panic(pr_fmt("Unable to get mck clk\n"));
 
 	at91sam926x_pit_irq.irq = NR_IRQS_LEGACY + AT91_ID_SYS;
 
@@ -263,5 +265,5 @@ void __init at91sam926x_ioremap_pit(u32 addr)
 	pit_base_addr = ioremap(addr, 16);
 
 	if (!pit_base_addr)
-		panic("Impossible to ioremap PIT\n");
+		panic(pr_fmt("Impossible to ioremap PIT\n"));
 }