pldmtool: Fix confusing attribute name
pldmtool: Fix confusing attribute name

- The intent behind this commit is to fix the confused attribute
  name. when we run `pldmtool bios getBIOSTable -t
  1(PLDM_BIOS_ATTR_TABLE)`, we can only get the default value and
  index.

- Early naming will make the caller mistakenly think that this is
  the currect value. In fact, we need to run `pldmtool bios
  getBIOSTable -t 2(PLDM_BIOS_ATTR_VAL_TABLE)` to get the currect
  value.

Tested:
- pldmtool bios getBIOSTable -t 1
  Before:
  {
	"AttributeHandle": 19,
	"AttributeNameHandle": "28(pvm_system_power_off_policy)",
	"AttributeType": "BIOSEnumeration",
	"NumberOfPossibleValues": 3,
	"PossibleValueStringHandle[0]": "12(Power Off)",
	"PossibleValueStringHandle[1]": "14(Stay On)",
	"PossibleValueStringHandle[2]": "2(Automatic)",
	"NumberOfDefaultValues": 1,
	"DefaultValueStringHandleIndex[0]": 2,
	"StringHandle": "2(Automatic)"
  }

  After:
  {
	"AttributeHandle": 19,
	"AttributeNameHandle": "28(pvm_system_power_off_policy)",
	"AttributeType": "BIOSEnumeration",
	"NumberOfPossibleValues": 3,
	"PossibleValueStringHandle[0]": "12(Power Off)",
	"PossibleValueStringHandle[1]": "14(Stay On)",
	"PossibleValueStringHandle[2]": "2(Automatic)",
	"NumberOfDefaultValues": 1,
	"DefaultValueStringHandleIndex[0]": 2,
	"DefaultValueStringHandle": "2(Automatic)"
  }

- pldmtool bios getBIOSTable -t 2
  {
    "AttributeHandle": 19,
    "AttributeType": "BIOSEnumeration",
    "NumberOfCurrentValues": 1,
    "CurrentValueStringHandleIndex[0]": "Automatic"
  }

Signed-off-by: George Liu <f124e69123cb985598dfa856ba74cb3263194267@inspur.com>
Change-Id: Ib493d80431dad039f264c65cbdcb8bab80ca85f0

openbmc/pldm,openbmc/pldm,openbmc/pldm