arm64: dts: ti: k3-pinctrl: Introduce debounce select mux macros

arm64: dts: ti: k3-pinctrl: Introduce debounce select mux macros

Introduce the debounce select mux macros to allow folks to setup
debounce configuration for pins. Each configuration selected maps
to a specific timing register as documented in appropriate Technical
Reference Manual (example:[1]).

[1] AM625x TRM (section 6.1.2.2): https://www.ti.com/lit/pdf/spruiv7

Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20230619131620.3286650-1-nm@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>