pcm052: fix DDR initialization sequence

The sequence erroneously launched the DDR controller
initialization before the pad muxing was done, causing
DRAM size computation to hang.

Configuring the pads first then launching DDR controller
initialization prevents the DRAM hanging.

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>

board/phytec/pcm052/pcm052.c

@@ -258,8 +258,7 @@ int dram_init(void)
 		.wldqsen           = 25,
 	};
 
-	ddrmc_ctrl_init_ddr3(&pcm052_ddr_timings, pcm052_cr_settings,
-			     pcm052_phy_settings, 1, 2);
+    const int row_diff = 2;
 
 #elif defined(CONFIG_TARGET_BK4R1)
 
@@ -314,8 +313,7 @@ int dram_init(void)
 		.wldqsen           = 25,
 	};
 
-	ddrmc_ctrl_init_ddr3(&pcm052_ddr_timings, pcm052_cr_settings,
-			     pcm052_phy_settings, 1, 1);
+    const int row_diff = 1;
 
 #else /* Unknown PCM052 variant */
 
@@ -325,6 +323,9 @@ int dram_init(void)
 
 	imx_iomux_v3_setup_multiple_pads(pcm052_pads, ARRAY_SIZE(pcm052_pads));
 
+	ddrmc_ctrl_init_ddr3(&pcm052_ddr_timings, pcm052_cr_settings,
+			     pcm052_phy_settings, 1, row_diff);
+
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
 
 	return 0;