soc: ti_k3: specify soc-specific ctrl partitions

The first two partitions in padconfig mmr regions need to be unlocked for
the pinctrl driver to be able to write. However, the base addresses for the
the registers can be different across SoCs and domains. Besides, currently
this is only done for M4 and that too not in the local (M4's) view.

This patch introduces a file specifying all ctrl partition base addresses
using ifdef directives for different SoCs and variants, and unlocking them
before the kernel and drivers initialize.

Signed-off-by: Amneesh Singh <a-singh7@ti.com>