arm64: dts: ti: k3-j784s4-evm: Enable TCA4608 I2C GPIO expander on main_i2c5

Enable the TCA5608 I2C GPIO expander on main_i2c5 which provides the
CSI2 expansion GPIOs on J784S4 EVM.

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>