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[nrf fromtree] nPM1300 LDO bug workaround #2530

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SW workaround for the nPM1300 anomaly 38

There is a HW bug in nPM1300 LDO which causes the LDO output voltage to
reach its target very slowly in specific cases. This is worked around by
performing an additional i2c read shortly after an LDO is enabled.

Signed-off-by: Sergei Ovchinnikov <[email protected]>
(cherry picked from commit 2d343589bb0a747b601a84a21eaa0ef9d87c27e8)
Added reference to nPM1300 anomaly 38 replacing generic "LDO bug"

Signed-off-by: Sergei Ovchinnikov <[email protected]>
(cherry picked from commit b432a01c2384910cdc79c5e1327125cc31a3464e)
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