wifi: mt76: mt7915: reduce the number of command retries

The need to retry a command is really uncommon. Reduce the retries to 1 to
speed up recovery from firmware issues.

Link: https://patch.msgid.link/20241230194202.95065-6-nbd@nbd.name


Signed-off-by: Felix Fietkau <nbd@nbd.name>