Feature Request: Enable and Parse RXM-COR and RXM-RTCM messages from a UBX module

[sseshan7]

UBX-RXM-COR: Differential correction input status
UBX-RXM-RTCM: RTCM input status

These two messages give visibility into the RTCM input status. This would be very useful during debugging or checking whether RTK is working correctly. The proposal is to enable these 2 messages on the module, add logic to parse these messages in the driver, and then publish the important status information to a uORB topic.

[sseshan7]

https://content.u-blox.com/sites/default/files/documents/u-blox-F9-HPG-1.32_InterfaceDescription_UBX-22008968.pdf

Pages 183 and 191.

[bkueng]

Do you want to work on this?
The only ask I have is to make it optional to reduce bandwidth, unless the overhead is negligible.