ARM: S5PV310: Fix on Secondary CPU startup

Following occurs on boot message without this patch.
    CPU1: processor failed to boot
    Brought up 1 CPUs
    SMP: Total of 1 processors activated...

This patch adds SYSRAM mapping for fixing Secondary CPU startup.
    CPU1: Booted secondary processor
    Brought up 2 CPUs
    SMP: Total of 2 processors activated...

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-s5pv310/cpu.c b/arch/arm/mach-s5pv310/cpu.c
index 2b74295..e5b261a 100644
--- a/arch/arm/mach-s5pv310/cpu.c
+++ b/arch/arm/mach-s5pv310/cpu.c
@@ -46,11 +46,16 @@
 		.length		= SZ_4K,
 		.type		= MT_DEVICE,
 	}, {
+		.virtual	= (unsigned long)S5P_VA_SYSRAM,
+		.pfn		= __phys_to_pfn(S5PV310_PA_SYSRAM),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	}, {
 		.virtual	= (unsigned long)S5P_VA_CMU,
 		.pfn		= __phys_to_pfn(S5PV310_PA_CMU),
 		.length		= SZ_128K,
 		.type		= MT_DEVICE,
-	}
+	},
 };
 
 static void s5pv310_idle(void)