[nrf fromtree] dts: nordic: Add nrf-qspi-v2 binding

The nrf-qspi-v2 peripheral is similar to EXMIF on nrf54h20
but supports DMA and slave-mode. The wrapper around
the SSI IP is also different with DMA features.

Signed-off-by: David Jewsbury <[email protected]>
(cherry picked from commit 72dd539)

Author: Hi-Im-David

dts/bindings/mspi/nordic,nrf-qspi-v2.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic QSPI v2 Interface using SSI IP
+
+compatible: "nordic,nrf-qspi-v2"
+
+include: snps,designware-ssi.yaml