arm64: dts: ti: k3-j784s4-evm: Add pinmux information for ADC

J784S4 has two instances of 8 channel ADCs in MCU domain. Add pinmux
information for both ADC nodes.

Signed-off-by: Bhavya Kapoor <b-kapoor@ti.com>
Link: https://lore.kernel.org/r/20230502081117.21431-3-b-kapoor@ti.com


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>