boards: shields: pca63565: enable NRF_SYS_EVENT

PCA63565 shield uses SPI21 on P2, which qualifies as
usage of cross domain pins. It requires NRF_SYS_EVENT
to be enabled in order to use constant latency mode.

Signed-off-by: Michał Stasiak <[email protected]>
(cherry picked from commit 4b123b6)

Author: mstasiaknordic

boards/shields/pca63565/boards/nrf54l15dk_nrf54l15_cpuapp.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_NRF_SYS_EVENT=y

boards/shields/pca63565/boards/nrf54l15dk_nrf54l15_cpuflpr.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_NRF_SYS_EVENT=y