regulator: da9063: Add missing initialization of da9063_reg_matches

With gcc 4.1.2:

drivers/regulator/da9063-regulator.c: In function ‘da9063_regulator_probe’:
drivers/regulator/da9063-regulator.c:847: warning: ‘da9063_reg_matches’ is used
uninitialized in this function

If the parent device already has platform data, da9063_reg_matches will
not be initialized.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/regulator/da9063-regulator.c

@@ -717,7 +717,7 @@ static int da9063_regulator_probe(struct platform_device *pdev)
 {
 	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
 	struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
-	struct of_regulator_match *da9063_reg_matches;
+	struct of_regulator_match *da9063_reg_matches = NULL;
 	struct da9063_regulators_pdata *regl_pdata;
 	const struct da9063_dev_model *model;
 	struct da9063_regulators *regulators;