clk: wm831x: Initialise wm831x pointer on init

Otherwise any attempt to interact with the hardware will crash. This is
what happens when drivers get written blind.

Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Turquette <mturquette@linaro.org>

drivers/clk/clk-wm831x.c

@@ -360,6 +360,8 @@ static int wm831x_clk_probe(struct platform_device *pdev)
 	if (!clkdata)
 		return -ENOMEM;
 
+	clkdata->wm831x = wm831x;
+
 	/* XTAL_ENA can only be set via OTP/InstantConfig so just read once */
 	ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2);
 	if (ret < 0) {