fapi2/buffer: Add convenience method to quickly extract bit ranges
fapi2/buffer: Add convenience method to quickly extract bit ranges

Change-Id: I5eeb5417ed49085c2debfb6933463717a10d4216
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/95452
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: PPE CI <dc75934ba5befb9221434e67a247b93aec46b36b@us.ibm.com>
Tested-by: Hostboot CI <52521565bd8ea18a2b112942dce4f4220a97c2c8@us.ibm.com>
Reviewed-by: Matt K Light <19ba8ed73a0b3c376c81fced381f1ac0f483b7c2@us.ibm.com>
Reviewed-by: Christopher M Riedl <604a32af17c936a1b3cc192600c23e30c002a7f7@ibm.com>
Reviewed-by: Jennifer A Stofer <ab93eca12e43608f33daa16a67357cd7b7e867ab@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/95464
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: Jenkins Combined Simics CI <8312af3886dfc9bb930f549023677220805b137e@us.ibm.com>
Reviewed-by: Nicholas E Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>

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