mxs: Do not disable bo detection when DC-DC is already enabled
In case the DC-DC is already enabled mxs_enable_4p2_dcdc_input() returns without reenabling brown out detection. So fix this issue by moving the return before brown out deactivation. Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com> Reviewed-by: NMarek Vasut <marex@denx.de>
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