This allows getting the current state reported by a remoteproc
from the SMSM data.

In some configurations, we are required to configure the BAM,
but the BAM clk is managed by a remote processor. It is only turned
on after coordination with the remote processor, and while turned off
accessing the registers results in a bus stall.

Attempt to support this mode by only accessing BAM registers when
a DMA channel is actually requested. Otherwise, keep the BAM in reset.

BAM DMUX is used as network interface to the modem on some older
Qualcomm SoCs like MSM8916 or MSM8974.

BAM DMUX is used as the network interface to the modem.

Add BAM DMUX as network interface to the modem.

Enable BAM DMUX as network interface to the modem.