target/hla_target: try to re-examine under reset in hl_assert_reset()
An application often idling in real sleep mode may make a Cortex-M target
hard to access as CPU clock are gated and debug requests are responded
by WAIT ack.
Try to examine the target under reset as the last resort.
Change-Id: I7c3de39fb1e6c23b76e2a0a85ab75f23aac94c4d
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/7229
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>