dm: powerpc: P1020: add i2c DM support

This supports i2c DM for SoC P1020

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/include/configs/P1022DS.h b/include/configs/P1022DS.h
index 5cc2e06..f8b035f 100644
--- a/include/configs/P1022DS.h
+++ b/include/configs/P1022DS.h
@@ -359,8 +359,8 @@
 #endif
 
 /* I2C */
+#ifndef CONFIG_DM_I2C
 #define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_FSL_I2C_SPEED	400000
 #define CONFIG_SYS_FSL_I2C_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C_OFFSET	0x3000
@@ -368,6 +368,8 @@
 #define CONFIG_SYS_FSL_I2C2_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C2_OFFSET	0x3100
 #define CONFIG_SYS_I2C_NOPROBES		{{0, 0x29}}
+#endif
+#define CONFIG_SYS_I2C_FSL
 
 /*
  * I2C2 EEPROM
diff --git a/include/configs/p1_p2_rdb_pc.h b/include/configs/p1_p2_rdb_pc.h
index c42f1a9..d59fd03 100644
--- a/include/configs/p1_p2_rdb_pc.h
+++ b/include/configs/p1_p2_rdb_pc.h
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2010-2011 Freescale Semiconductor, Inc.
+ * Copyright 2020 NXP
  */
 
 /*
@@ -537,8 +538,8 @@
 #define CONFIG_SYS_NS16550_COM2	(CONFIG_SYS_CCSRBAR+0x4600)
 
 /* I2C */
+#ifndef CONFIG_DM_I2C
 #define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_FSL_I2C_SPEED	400000
 #define CONFIG_SYS_FSL_I2C_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C_OFFSET	0x3000
@@ -546,6 +547,12 @@
 #define CONFIG_SYS_FSL_I2C2_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C2_OFFSET	0x3100
 #define CONFIG_SYS_I2C_NOPROBES		{ {0, 0x29} }
+#else
+#define CONFIG_I2C_SET_DEFAULT_BUS_NUM
+#define CONFIG_I2C_DEFAULT_BUS_NUMBER	0
+#endif
+
+#define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_I2C_EEPROM_ADDR	0x52
 #define CONFIG_SYS_SPD_BUS_NUM		1 /* For rom_loc and flash bank */