dm: fsl_i2c: Enable DM for FSL I2C

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/include/asm/fsl_i2c.h b/arch/powerpc/include/asm/fsl_i2c.h
index e94bdc6..d2586f9 100644
--- a/arch/powerpc/include/asm/fsl_i2c.h
+++ b/arch/powerpc/include/asm/fsl_i2c.h
@@ -68,4 +68,14 @@
 	u8 res6[0xE8];
 } fsl_i2c_t;
 
+#ifdef CONFIG_DM_I2C
+struct fsl_i2c_dev {
+	struct fsl_i2c_base __iomem *base;      /* register base */
+	u32 i2c_clk;
+	u32 index;
+	u8 slaveadd;
+	uint speed;
+};
+#endif
+
 #endif	/* _ASM_I2C_H_ */