ARM: uniphier: use pr_err() where possible

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

arch/arm/mach-uniphier/dram/umc-ph1-pro4.c

@@ -82,7 +82,7 @@ static int umc_dramcont_init(void __iomem *dramcont, void __iomem *ca_base,
 		dram_size = DRAM_SZ_512M;
 		break;
 	default:
-		printf("unsupported DRAM size\n");
+		pr_err("unsupported DRAM size\n");
 		return -EINVAL;
 	}
 

arch/arm/mach-uniphier/dram/umc-proxstream2.c

@@ -344,7 +344,7 @@ static int __ddrphy_training(void __iomem *phy_base,
 
 	do {
 		if (--timeout < 0) {
-			printf("%s: error: timeout during DDR training\n",
+			pr_err("%s: error: timeout during DDR training\n",
 			       __func__);
 			return -ETIMEDOUT;
 		}
@@ -354,7 +354,7 @@ static int __ddrphy_training(void __iomem *phy_base,
 
 	for (s = seq; s->description; s++) {
 		if (pgsr0 & s->err_flag) {
-			printf("%s: error: %s failed\n", __func__,
+			pr_err("%s: error: %s failed\n", __func__,
 			       s->description);
 			return -EIO;
 		}
@@ -597,7 +597,7 @@ int proxstream2_umc_init(const struct uniphier_board_data *bd)
 		freq = FREQ_2133M;
 		break;
 	default:
-		printf("unsupported DRAM frequency %d MHz\n", bd->dram_freq);
+		pr_err("unsupported DRAM frequency %d MHz\n", bd->dram_freq);
 		return -EINVAL;
 	}
 
@@ -606,7 +606,7 @@ int proxstream2_umc_init(const struct uniphier_board_data *bd)
 			       bd->dram_ch[ch].size / SZ_256M,
 			       bd->dram_ch[ch].width);
 		if (ret) {
-			printf("failed to initialize UMC ch%d\n", ch);
+			pr_err("failed to initialize UMC ch%d\n", ch);
 			return ret;
 		}