Confusing/wrong uio_id_str in uio-can-example.c

[tstana]

The CAN example code on this repository seems to use the wrong CAN peripheral. Steps to replicate:

1. L126 of the code indicates it should be the CAN peripheral at address 2010c000 that this code should be addressing;
2. according to the register map, CAN_A should be at address 0x2010 C000
3. adjusting your example code to employ Normal mode (instead of the default Loopback) and connecting it to an external USB2CAN dongle, the code accesses CAN2, J27 on the MPFS-ICICLE-KIT -- not CAN1!

As far as I can tell, this is either an issue with the code, or somewhere in the documentation (CAN_A/B to CAN1/2 mapping, or schematics).