[FS#630] rt2x00: bug with mt7620 target power parsing from eeprom

[LEDE Bugs]

The following task is now closed:

FS#630 - rt2x00: bug with mt7620 target power parsing from eeprom
User who did this - Yousong Zhou (yousong)

Reason for closing: Deferred
Additional comments about closing: Feel free to add further info if the issue persists.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=630