x86: tangier: Replace Method() by Name() for _STA object

x86: tangier: Replace Method() by Name() for _STA object

There is no point to use Method() for the constant.
Replace it with Name() defined object. For the _STA
case it saves 3 bytes per each entry.

Before: 2881
After: 2833

Signed-off-by: Andy Shevchenko <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Bin Meng <[email protected]>