mt76: dma: use kzalloc instead of devm_kzalloc for txwi

dma unmap is already needed for cleanup anyway, so we don't need the extra
tracking and can save a bit of memory here

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2022-03-19 21:56:20 +01:00
commit 402e01092e