CVE-2022-49484 mt76: mt7915: fix possible NULL pointer dereference in mt7915_mac_fill_rx_vector

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7915: fix possible NULL pointer dereference in mt7915macfillrxvector Fix possible NULL pointer dereference in mt7915macfillrxvector routine if the chip does not support dbdc and the hw reports bandidx set to 1...