i2c: mpc: use proper binding for transfer timeouts

"i2c-scl-clk-low-timeout-us" is wrongly used here because it describes
maximum clock stretching not maximum transfer time. Additionally, it is
deprecated because of issues. Move this driver to the correct binding.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>

drivers/i2c/busses/i2c-mpc.c

@@ -844,11 +844,11 @@ static int fsl_i2c_probe(struct platform_device *op)
 			mpc_i2c_setup_8xxx(op->dev.of_node, i2c, clock);
 	}
 
-	/*
-	 * "fsl,timeout" has been marked as deprecated and, to maintain
-	 * backward compatibility, we will only look for it if
-	 * "i2c-scl-clk-low-timeout-us" is not present.
-	 */
+	/* Sadly, we have to support two deprecated bindings here */
+	result = of_property_read_u32(op->dev.of_node,
+				      "i2c-transfer-timeout-us",
+				      &mpc_ops.timeout);
+	if (result == -EINVAL)
 		result = of_property_read_u32(op->dev.of_node,
 					      "i2c-scl-clk-low-timeout-us",
 					      &mpc_ops.timeout);