stlink: add support for rw-misc commands
Firmware versions V2J32 and V3J2 introduce the commands RW-MISC
to put in a single USB packet a sequence of mem_ap read/write.
These commands provide a significant speed improvement while
accessing the debug unit at scattered addresses.
Add the low level commands and extend high level implementation.
Skip for the moment the command to read the max number of items
allowed by the firmware and use some hardcoded values.
Change-Id: I8adc630cc0de733511e9d94533cbfe9f3b301a83
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6607
Tested-by: jenkins
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>