boards: shields: add support for low power on G1120B0MIPI using RT595

Add support for low power mode on the G1120B0MIPI using the RT595. This
configuration is tested via a testcase in samples/drivers/display, which
should validate that the display can be driven by the RT595 when
CONFIG_PM and CONFIG_PM_DEVICE are set.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>

boards/shields/g1120b0mipi/boards/mimxrt595_evk_cm33.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2023, NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* Change deep sleep config for suspend mode to keep SMARTDMA ram powered,
+ * so the SMARTDMA will continue functioning after deep sleep
+ */
+&suspend {
+	deep-sleep-config = <0xC800>,
+				<0x80030004>,
+				<0xFFFFFFFF>,
+				<0>;
+};

samples/drivers/display/sample.yaml

@@ -131,3 +131,14 @@ tests:
     harness: console
     harness_config:
       fixture: fixture_display
+  sample.display.g1120b0mipi:
+    platform_allow: mimxrt595_evk_cm33
+    tags: display
+    harness: console
+    extra_args: SHIELD=g1120b0mipi
+    extra_configs:
+      - CONFIG_PM=y
+      - CONFIG_PM_DEVICE=y
+      - CONFIG_IDLE_STACK_SIZE=400
+    harness_config:
+      fixture: fixture_display