dt-bindings: omap5: ctrl: Support for control module wkup pad config

The pad configuration area under control module wkup has some miscellaneous
config registers, that are not pinmux related.
Add new compatible string for this section of control module.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>