* More operation in chipsec_util reg command
Added write, read_field, write_field, get_control, set_control
operations
* reg read util command updated
Returned back "chipsec_util reg read" syntax and added tests.
* Commented out test_reg_get_control
Need to implement get_MMIO_BAR_base_address or read_pci_reg for SPIBAR
in mock_helper.py