Add PMIC target
Add PMIC target

The PMIC will be controlled via i2c operations to enable power
to the OCMB and DIMMs on Axone.

Change-Id: I1111ad852f3715c849a168d6f8d9d35f7c8acfe0
RTC:206151
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/73080
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: HWSV CI <ae069ce3805842f4ed79e0ef7868baadb5df0a6b@us.ibm.com>
Tested-by: PPE CI <dc75934ba5befb9221434e67a247b93aec46b36b@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: Matt K. Light <19ba8ed73a0b3c376c81fced381f1ac0f483b7c2@us.ibm.com>
Reviewed-by: Brent Wieman <cab499b31cd4c652b90b4682871101e72d52e19a@us.ibm.com>
Tested-by: Hostboot CI <52521565bd8ea18a2b112942dce4f4220a97c2c8@us.ibm.com>
Reviewed-by: Louis Stermole <a2bef96d502debd02962600aef4d81d949c35039@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <ab93eca12e43608f33daa16a67357cd7b7e867ab@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/74665

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot