Use the macro 'LOG_LEVEL_IS()' to test 'debug_level'.
While there, use the macro 'LOG_LVL_*' in place of the numeric
value.
Skip all riscv code, as it is going to be updated soon from the
external fork.
Change-Id: Icad7e879e040d3b9cf1cc004c433f28725017493
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9070
Tested-by: jenkins