ARM: uniphier: add const qualifier to constant array

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/ddrphy/ddrphy-training.c

@@ -44,7 +44,7 @@ struct ddrphy_init_sequence {
 	u32 err_flag;
 };
 
-static struct ddrphy_init_sequence init_sequence[] = {
+static const struct ddrphy_init_sequence init_sequence[] = {
 	{
 		"DRAM Initialization",
 		PIR_DRAMRST | PIR_DRAMINIT,