I2C: ls1043a, ls1046a: enable SYS_I2C_MXC

This enables SYS_I2C_MXC to fix a bug that
failed to boot from sd card with
image u-boot-with-spl-pbl.bin

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/include/configs/ls1043a_common.h b/include/configs/ls1043a_common.h
index 1271d70..96fdd64 100644
--- a/include/configs/ls1043a_common.h
+++ b/include/configs/ls1043a_common.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor
- * Copyright (C) 2019 NXP
+ * Copyright 2019-2020 NXP
  */
 
 #ifndef __LS1043A_COMMON_H
@@ -144,7 +144,6 @@
 /* I2C */
 #ifndef CONFIG_DM_I2C
 #define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_MXC
 #define CONFIG_SYS_I2C_MXC_I2C1		/* enable I2C bus 1 */
 #define CONFIG_SYS_I2C_MXC_I2C2		/* enable I2C bus 2 */
 #define CONFIG_SYS_I2C_MXC_I2C3		/* enable I2C bus 3 */