charger-manager: Fix regulator_get() return check
This patch fixes return value checking of regulator_get() in charger-manager driver. The API, regulator_get(), returns ERR_PTR() when it fails to get regulator with given name, not NULL. Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
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