ARM: OMAP4: PM: Add SAR RAM support

This patch adds SAR RAM support on OMAP4430. SAR RAM used to save
and restore the HW context in low power modes.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
index ca04152..7ebcb6a 100644
--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -182,6 +182,7 @@
 
 extern void __init gic_init_irq(void);
 extern void omap_smc1(u32 fn, u32 arg);
+extern void __iomem *omap4_get_sar_ram_base(void);
 
 #ifdef CONFIG_SMP
 /* Needed for secondary core boot */