tests: drivers: spi: enable tests on ucans32k1sic

Add overlays to enable SPI tests on ucans32k1sic board.

(cherry picked from commit f46a27f)

Original-Signed-off-by: Manuel Argüelles <manuel.arguelles@nxp.com>
GitOrigin-RevId: f46a27f
Change-Id: I842d09f85da0b12344185b2c4501026492ca8a36
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5099020
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Fabio Baltieri <fabiobaltieri@google.com>
Commit-Queue: Fabio Baltieri <fabiobaltieri@google.com>
Tested-by: Fabio Baltieri <fabiobaltieri@google.com>

tests/drivers/spi/spi_loopback/boards/ucans32k1sic.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2023 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* Short P1.3 (SPI0/MISO) with P1.4 (SPI0/MOSI) */
+
+&lpspi0 {
+	slow@0 {
+		compatible = "test-spi-loopback-slow";
+		reg = <0>;
+		spi-max-frequency = <500000>;
+	};
+	fast@0 {
+		compatible = "test-spi-loopback-fast";
+		reg = <0>;
+		spi-max-frequency = <9000000>;
+	};
+};