b43: dma: Fix use true/false for bool type variable

[ Upstream commit a9160bb35ad9ada8428a4d48426f7fc128db40cc ]

use true/false for bool type variables assignment.

Signed-off-by: Saurav Girepunje <saurav.girepunje@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Stable-dep-of: 9636951e4468 ("wifi: b43: Stop/wake correct queue in DMA Tx path when QoS is disabled")
Signed-off-by: Sasha Levin <sashal@kernel.org>