OpenOCD should detect if DMI address exceeds the DMI bus width (dtmcs.abits)

[JanMatCodasip]

Discovered during the implementation of #1202:

When DMI access is requested by the RISC-V target, the JTAG DTM implementation in OpenOCD (batch.c) shall check that the address of the access is not wider than dtmcs.abits, otherwise an error should be printed. Currently such a check is missing, and the address gets silently truncated.

Possible implementation:

• Rework the contents of struct riscv_batch to store the DMI items (address, data, operation), not the raw JTAG scans.
• In riscv_batch_run_from(), perform the validation of the DMI addresses.
• Only if successful, create the actual raw JTAG scans and send them for execution to the adapter driver.