Add support for the TI K3 family AM243 SoC. This SoC is built on the same base of AM642, so reuse the configuration with the exception of Cortex-A53 which is not available on this device. For further details, see https://www.ti.com/lit/pdf/spruim2 Change-Id: I971ba878b0f503e5120f6853634776eb61d05080 Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-on: https://review.openocd.org/c/openocd/+/7946 Tested-by: jenkins Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>