keystone2: ddr3: eliminate using global ddr3_size variable

KS2 ddr3 initialization uses ddr3_size global variable before u-boot
relocation. Even if the variable is not being used after relocation,
writing to it corrupts relocation table.

This patch removes the global ddr3_size variable and uses local one
instead.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
diff --git a/arch/arm/include/asm/arch-keystone/ddr3.h b/arch/arm/include/asm/arch-keystone/ddr3.h
index b044d6f..a22c237 100644
--- a/arch/arm/include/asm/arch-keystone/ddr3.h
+++ b/arch/arm/include/asm/arch-keystone/ddr3.h
@@ -48,10 +48,9 @@
 	unsigned int sdrfc;
 };
 
-void ddr3_init(void);
-int ddr3_get_size(void);
+u32 ddr3_init(void);
 void ddr3_reset_ddrphy(void);
-void ddr3_init_ecc(u32 base);
+void ddr3_init_ecc(u32 base, u32 ddr3_size);
 void ddr3_disable_ecc(u32 base);
 void ddr3_check_ecc_int(u32 base);
 int ddr3_ecc_support_rmw(u32 base);