at91: factorize sram 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>
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index a9d6ed4..938b34f 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -12,6 +12,8 @@
 
  /* Map io */
 extern void __init at91_map_io(void);
+extern void __init at91_init_sram(int bank, unsigned long base,
+				  unsigned int length);
 
  /* Processors */
 extern void __init at91rm9200_set_type(int type);