regulator/of_get_regulator: add child path to find the regulator supplier
when the VIR_LDO1 regulator supplier is it's brother,
we can't find the supplier.
example code :
&vir_regulator {
ldo0_vir: ldo0-virtual {
regulator-compatible = "VIR_LDO0";
regulator-name= "VIR_LDO0";
regulator-min-microvolt = <
1000000>;
regulator-max-microvolt = <
2000000>;
};
ldo1_vir: ldo1-virtual {
regulator-compatible = "VIR_LDO1";
regulator-name= "VIR_LDO1";
regulator-min-microvolt = <
1000000>;
regulator-max-microvolt = <
3000000>;
ldo1-supply = <&ldo0_vir>;
};
...
}
so we add the child ptah to find the suppier.
Signed-off-by: zoro <long17.cool@163.com>
Signed-off-by: Mark Brown <broonie@kernel.org>