arm64: dts: ti: k3-am62a7-sk: Add interrupt support for IO Expander

arm64: dts: ti: k3-am62a7-sk: Add interrupt support for IO Expander

The Hot Plug Detect (HPD) signal for the HDMI display travels from the
on-board HDMI connector, through the IO Expander 1, and finally to the
main_gpio1 GPIO 23, of the SoC.

Add interrupt information for the IO Expander 1 (exp1) along with the
relevant pinmux.

Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Reviewed-by: Jai Luthra <j-luthra@ti.com>
Link: https://lore.kernel.org/r/20231108191652.1118155-1-a-bhatia1@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>