arm64: dts: allwinner: a523: add IR receiver nodes

The A523 has two CIR receivers, both compatible with the A31 CIR: one
in the CPUX domain, clocked from the main CCU, and one in the RTC
power domain, clocked from the R-CCU.

The RTC domain instance's RX signal is typically muxed to PL11, as on
the X96Q Pro+. The CPUX instance's can be muxed to PI8, which is what
the Avaota A1 uses.

Add nodes for both instances, disabled by default. Since the RX signal
of each instance can be routed to more than one pin, boards with an IR
receiver are expected to add the pinctrl properties next to where they
enable the node.

Add pinmux nodes for both pins: PL11 for the RTC domain instance, and
PI8 for the CPUX one.

Co-developed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Justin Suess <utilityemal77@gmail.com>
Link: https://patch.msgid.link/20260728024916.993224-3-utilityemal77@gmail.com
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>

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