tcl/target: Add support for TMS570LC43xx

tcl/target: Add support for TMS570LC43xx

Added support for TMS570LC43xx series parts.  This uses the pre-existing
ti_tms570.cfg parent config.  In ti_tms570.cfg, dbgbase was changed.
Note 1: Based on the following TI E2E post, the previous dbgbase was wrong
and the new value isn't due to a difference in parts.
Link: https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1106954/tms570ls3137-debugging-with-openocd
Note 2: Both the previous dbgbase and the one suggested in the TI E2E post
have the 2 LSB set. In the current version of OpenOCD, this will cause
cortex_a_read_cpu_memory_fast and cortex_a_write_cpu_memory_fast to fail
due to an alignment checks in
mem_ap_<read/write>_buf_noincr()->mem_ap_<read/write>().
In all other uses of dbgbase for arm cortex parts, the 2 LSB are masked
and ignored.

Change-Id: Ic936722e5a4cfc7161b0df1fe3325ee12fd901c6
Signed-off-by: Phil Kirkpatrick <p.kirkpatrick@reflexaerospace.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7682
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>