Debugging: writes less than 4 bytes fail

[cahz]

Verbose log from OpenOCD:

Debug: 3454420 26428 riscv-013.c:2824 mem_should_skip_progbuf(): Skipping mem write via progbuf - insufficient progbuf size.
Debug: 3454421 26428 riscv-013.c:2864 mem_should_skip_sysbus(): Skipping mem write via system bus - unsupported size.
Debug: 3454422 26428 riscv-013.c:3006 write_memory_abstract(): writing 1 words of 2 bytes from 0xee0081f4
Debug: 3454423 26428 tapasco-axi-jtag.c:348 axi_jtag_execute_command(): axi_jtag_execute_command: cmd->type: 1

/* shortened */

Debug: 3454827 26429 tapasco-axi-jtag.c:252 axi_jtag_execute_scan(): DR scan type 3 62 bits; starts in RESET end in RUN/IDLE
Info : 3454828 26429 tapasco-axi-jtag.c:323 axi_jtag_execute_scan(): TAPASCO: DMI: op: 0, data: 0 addr: 16 tdo: c08
Debug: 3454829 26429 commands.c:265 jtag_read_buffer(): fields[0].in_value[41]: 0x000000000c08
Debug: 3454830 26429 core.c:966 default_interface_jtag_execute_queue(): JTAG DR SCAN to RUN/IDLE
Debug: 3454831 26429 core.c:973 default_interface_jtag_execute_queue():   41b out: 005800000000
Debug: 3454832 26429 core.c:978 default_interface_jtag_execute_queue():   41b  in: 000000000c08
Debug: 3454833 26429 riscv-013.c:402 scan(): 41b - 00000000 @16 -> + 00000302 @00; 0i
Debug: 3454834 26429 riscv-013.c:806 execute_abstract_command(): command 0x2110000 failed; abstractcs=0x302