drivers: iio: admv1013: add vcc regulators

Add regulators for the VCC supplies of the admv1013.

The patch aims to align the implementation with the current admv1014
driver where all the VCC supplies are handled as regulators.

Signed-off-by: Antoniu Miclaus <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/frequency/admv1013.c

···
 	.debugfs_reg_access = &admv1013_reg_access,
 };
 
+static const char * const admv1013_vcc_regs[] = {
+	 "vcc-drv", "vcc2-drv", "vcc-vva", "vcc-amp1", "vcc-amp2",
+	 "vcc-env", "vcc-bg", "vcc-bg2", "vcc-mixer", "vcc-quad"
+};
+
 static int admv1013_freq_change(struct notifier_block *nb, unsigned long action, void *data)
 {
 	struct admv1013_state *st = container_of(nb, struct admv1013_state, nb);
···
 	if (IS_ERR(st->reg))
 		return dev_err_probe(&spi->dev, PTR_ERR(st->reg),
 				     "failed to get the common-mode voltage\n");
+
+	ret = devm_regulator_bulk_get_enable(&st->spi->dev,
+					     ARRAY_SIZE(admv1013_vcc_regs),
+					     admv1013_vcc_regs);
+	if (ret) {
+		dev_err_probe(&spi->dev, ret,
+			      "Failed to request VCC regulators\n");
+		return ret;
+	}
 
 	return 0;
 }