regulator: onsemi-ncp6335d: Add i2c retry logic

The i2c-core may perform a bus recovery procedure if
the I2C lines are stuck low. In such a case the client
is expected to retry its i2c transaction. Add a mechanism
to perform multiple delayed retries in case of a I2C
transaction failure.

CRs-Fixed: 715354
Change-Id: Idbdeb070740752be958bb877d9c538a35c99eb7b
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>