at91: move clock subsystem init to soc generic init

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Patrice Vilchez <patrice.vilchez@atmel.com>

arch/arm/mach-at91/soc.h

@@ -7,7 +7,7 @@
 struct at91_init_soc {
 	unsigned int *default_irq_priority;
 	void (*map_io)(void);
-	void (*init)(unsigned long main_clock);
+	void (*init)(void);
 };
 
 extern struct at91_init_soc at91_boot_soc;