[nrf fromtree] tests: drivers: spi: spi_loopback: Add testcase for cc23x0

Enable DMA for the test.

Signed-off-by: Julien Panis <[email protected]>
(cherry picked from commit a631df5)

Author: jpanisbl

tests/drivers/spi/spi_loopback/boards/lp_em_cc2340r5.conf

@@ -0,0 +1 @@
+CONFIG_SPI_LOOPBACK_MODE_LOOP=y

tests/drivers/spi/spi_loopback/boards/lp_em_cc2340r5.overlay

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2024 BayLibre, SAS
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi0 {
+	slow@0 {
+		compatible = "test-spi-loopback-slow";
+		reg = <0>;
+		spi-max-frequency = <2000000>;
+	};
+	fast@0 {
+		compatible = "test-spi-loopback-fast";
+		reg = <0>;
+		spi-max-frequency = <3000000>;
+	};
+};

tests/drivers/spi/spi_loopback/testcase.yaml

@@ -314,3 +314,10 @@ tests:
     filter: CONFIG_SOC_FAMILY_SILABS_SIWX91X
     platform_allow:
       - siwx917_rb4338a
+  drivers.spi.cc23x0.loopback.dma.no_async:
+    filter: CONFIG_SOC_FAMILY_TI_SIMPLELINK
+    platform_allow:
+      - lp_em_cc2340r5
+    extra_configs:
+      - CONFIG_SPI_CC23X0_DMA_DRIVEN=y
+      - CONFIG_SPI_ASYNC=n