board: pm9g45: Migrate to CONFIG_DM

Migrate the following options to CONFIG_DM:
  CONFIG_DM_GPIO
  CONFIG_DM_MMC
  CONFIG_DM_ETH
  CONFIG_DM_SERIAL
  CONFIG_DM_USB

Signed-off-by: Ilko Iliev <iliev@ronetix.at>
diff --git a/board/ronetix/pm9g45/pm9g45.c b/board/ronetix/pm9g45/pm9g45.c
index 17e520a..c5d28c6 100644
--- a/board/ronetix/pm9g45/pm9g45.c
+++ b/board/ronetix/pm9g45/pm9g45.c
@@ -124,7 +124,7 @@
 	/* arch number of AT91SAM9M10G45EK-Board */
 	gd->bd->bi_arch_number = MACH_TYPE_PM9G45;
 	/* adress of boot parameters */
-	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 
 #ifdef CONFIG_CMD_NAND
 	pm9g45_nand_hw_init();
@@ -139,15 +139,15 @@
 int dram_init(void)
 {
 	/* dram_init must store complete ramsize in gd->ram_size */
-	gd->ram_size = get_ram_size((void *)PHYS_SDRAM,
-				PHYS_SDRAM_SIZE);
+	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
+				    CONFIG_SYS_SDRAM_SIZE);
 	return 0;
 }
 
 int dram_init_banksize(void)
 {
-	gd->bd->bi_dram[0].start = PHYS_SDRAM;
-	gd->bd->bi_dram[0].size = PHYS_SDRAM_SIZE;
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = CONFIG_SYS_SDRAM_SIZE;
 
 	return 0;
 }