extend msp_override_mask to 32bits / channels

[stronnag]

After the number of channels was raised to 34 in INAV 8, it seems appropriate to allow a 32bit / 32 channel MSP override mask.

[sensei-hacker]

I'm going through and marking a bunch of PRs as testing needed, then I'm going to encourage some folks to start testing.

[stronnag]

Tested successfully with msp_setoverride and mwp HID mode 16bit
Fails in 32 bit ... fix on it's way

[stronnag]

Tested OK with 32bit mask:

# override channels 12 & 20
set msp_override_channels = 526336

$ msp_setoverride -d /dev/ttyACM0 --maxchan 34 --every 0 12=1234 20=1234
0.944 Tx: 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1234 1567 1567 1567 1567 1567 1567 1567 1234 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567
0.976 Rx: 1492 1495 1500  997  987  987  987  987 1500  987  987 1234 1500 1500 1500 1500  988  988 1500 1234 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500

Both 16bit (ch12) and 32bit(ch20) are overwritten

set msp_override_channels = 0

1.008 Tx: 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1234 1567 1567 1567 1567 1567 1567 1567 1234 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567 1567
1.040 Rx: 1492 1495 1500  997  987  987  987  987 1500  987  987  987 1500 1500 1500 1500  988  988 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500 1500

No channels are overwritten.

[b14ckyy]

Will run some tests later today as well. But I would say we can add this to a 8.1 release since it does not change existing behavior, even if existing config value is re-used.

[stronnag]

It changes the size of the parameter group, requiring a full erase
Which is why it's queued for 9.0