atmel: Update support of board AT91SAM9M10G45-EK to new style

Based on earlier work by Alex Waterman <awaterman@dawning.com>.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/board/atmel/at91sam9m10g45ek/led.c b/board/atmel/at91sam9m10g45ek/led.c
index ff59a2d..dadbd6a 100644
--- a/board/atmel/at91sam9m10g45ek/led.c
+++ b/board/atmel/at91sam9m10g45ek/led.c
@@ -23,15 +23,17 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
 #include <asm/arch/at91sam9g45.h>
 #include <asm/arch/at91_pmc.h>
 #include <asm/arch/gpio.h>
-#include <asm/arch/io.h>
 
 void coloured_LED_init(void)
 {
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
 	/* Enable clock */
-	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9G45_ID_PIODE);
+	writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
 
 	at91_set_gpio_output(CONFIG_RED_LED, 1);
 	at91_set_gpio_output(CONFIG_GREEN_LED, 1);