boards: ls2088a: Add support of I2C driver model.

DM_I2C_COMPAT is a compatibility layer that allows using the non-DM
I2C API when DM_I2C is used.When DM_I2C_COMPAT is not enabled for
compilation, a compilation error will be generated. This patch
solves the problem that the i2c-related api of the ls2088a platform
does not support dm.

Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
diff --git a/board/freescale/ls2080ardb/ls2080ardb.c b/board/freescale/ls2080ardb/ls2080ardb.c
index e000b1f..e20267f 100644
--- a/board/freescale/ls2080ardb/ls2080ardb.c
+++ b/board/freescale/ls2080ardb/ls2080ardb.c
@@ -164,7 +164,16 @@
 {
 	int ret;
 
+#ifndef CONFIG_DM_I2C
 	ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
+#else
+	struct udevice *dev;
+
+	ret = i2c_get_chip_for_busnum(0, I2C_MUX_PCA_ADDR_PRI, 1, &dev);
+	if (!ret)
+		ret = dm_i2c_write(dev, 0, &ch, 1);
+#endif
+
 	if (ret) {
 		puts("PCA: failed to select proper channel\n");
 		return ret;