FROMLIST: arm64: dts: qcom: monaco-evk: Extract common EVK hardware into shared dtsi

The monaco-ac EVK is a new board variant which shares the majority of
its hardware description with the existing monaco-evk board.

In preparation for adding this variant, extract the common hardware
nodes from monaco-evk.dts into a new shared monaco-evk-common.dtsi
include file, and update monaco-evk.dts to include it and keep only
board-specific overrides.

No functional change intended.

Link: https://lore.kernel.org/lkml/20260413114819.3894307-2-umang.chheda@oss.qualcomm.com/
Signed-off-by: Umang Chheda <umang.chheda@oss.qualcomm.com>

Author: umang-chheda