crc-24q used with RTCMv3

[ventureresearch]

Qualcomm CRC-24Q as used with RTCMv3. Similar to the other crc-24 but with xor_in = 0.

models.append({
    'name':         'crc-24q',
    'width':         24,
    'poly':          0x864cfb,
    'reflect_in':    False,
    'xor_in':        0x0,
    'reflect_out':   False,
    'xor_out':       0x0,
    'check':         0xcde703,
})

Generated code was verified on real RTCM data, 'check' was produced by --check-string "123456789". Checking with another RTCMv3 string should show this, matching the checksum on the wire 0xa8f72a:

python3 pycrc.py --width=24 --poly=0x864CFB --reflect-in=false --xor-in=0 --reflect-out=false --xor-out=0 --check-hexstring "d300084ce0008a00000000"
0xa8f72a