tcl/target/ti_k3: Add support for AM263P

tcl/target/ti_k3: Add support for AM263P

AM263P[1] adds additional features to AM263 SoC. [2] provides a
detailed list of differences, however, the key difference from
processor usage perspective is the increased SRAM and Remote L2(RL2)
Cache for improved performance of R5F. To differentiate the DIE ID
is different, however rest of the processor description remain
compatible to AM263, hence reuse the definition.

[1] https://www.ti.com/product/AM263P4
[2] https://www.ti.com/lit/pdf/spradb3

Change-Id: If47935caf1f995d7e606547e0d6545c39544678a
Signed-off-by: Shivasharan Nagalikar <shivasharan.nagalikar@ti.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8770
Reviewed-by: Nishanth Menon <nm@ti.com>
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>