fix(legacy-mcu1): resolve fdrv firmware dirs without CONFIG_PLATFORM_UBUNTU

The chip directory lookup in aic8800_fdrv's aic_request_firmware() is
guarded by CONFIG_PLATFORM_UBUNTU, but the fdrv Makefile never passes
-DCONFIG_PLATFORM_UBUNTU (only aic_load_fw's Makefile does). With
CONFIG_USE_FW_REQUEST=y the Wi-Fi driver therefore requests bare names
such as aic_userconfig_8800d80.txt, which are not found, so the user
config (TX power tables and the rest) is silently skipped.

Guard the lookup with AICWF_USB_SUPPORT only, and make the firmware test
compile each module with the macros its own Makefile defines.

drivers/aic8800/aic8800_fdrv/rwnx_platform.c

@@ -613,7 +613,7 @@ static int rwnx_plat_bin_fw_upload(struct rwnx_plat *rwnx_plat, u8* fw_addr,
 static int aic_request_firmware(const struct firmware **fw, const char *name,
                                struct device *device)
 {
-#if defined(CONFIG_PLATFORM_UBUNTU) && defined(AICWF_USB_SUPPORT)
+#if defined(AICWF_USB_SUPPORT)
     struct aicwf_bus *bus = device ? dev_get_drvdata(device) : NULL;
     struct aic_usb_dev *usbdev = bus ? bus->bus_priv.usb : NULL;
     const char *dir = NULL;

tests/firmware/test_request_firmware.py

@@ -86,7 +86,7 @@ int main(void) {
     for (unsigned int i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
         char path[256];
         snprintf(path, sizeof(path), "%s/fw.bin", cases[i].dir);
-#if defined(CONFIG_PLATFORM_UBUNTU) && defined(AICWF_USB_SUPPORT)
+#ifdef EXPECT_CHIPDIR
         setup(cases[i].chip, path);
 #else
         setup(cases[i].chip, "fw.bin");
@@ -97,7 +97,7 @@ int main(void) {
     setup(cases[0].chip, "fw.bin"); hw.dev = expected_device = NULL; success();
     setup(cases[0].chip, "fw.bin"); dev.data = NULL; success();
     setup(cases[0].chip, "fw.bin"); bus.bus_priv.usb = NULL; success();
-#if defined(CONFIG_PLATFORM_UBUNTU) && defined(AICWF_USB_SUPPORT)
+#ifdef EXPECT_CHIPDIR
     char path[256];
     snprintf(path, sizeof(path), "%s/fw.bin", cases[0].dir);
     setup(cases[0].chip, path);
@@ -165,8 +165,20 @@ class RequestFirmwareTests(unittest.TestCase):
                 for chip in chips:
                     code += '{PRODUCT_ID_' + chip + ', "' + directory + '"},\n'
             code += "};\n" + CHECKS
+            # The flags the module's own Makefile passes must select the chip
+            # directories: aic_load_fw defines both macros, aic8800_fdrv only
+            # AICWF_USB_SUPPORT.
+            makefile = (folder / "Makefile").read_text()
+            build = sorted(set(re.findall(
+                r"^ccflags-\S+\s*\+=\s*-D(CONFIG_PLATFORM_UBUNTU|AICWF_USB_SUPPORT)\b",
+                makefile, re.M)))
+            chipdir = (lambda d: "AICWF_USB_SUPPORT" in d) if module == "aic8800_fdrv" else \
+                (lambda d: "AICWF_USB_SUPPORT" in d and "CONFIG_PLATFORM_UBUNTU" in d)
+            self.assertTrue(chipdir(build), (module, build))
             for defines in ([], ["CONFIG_PLATFORM_UBUNTU", "AICWF_USB_SUPPORT"],
-                            ["CONFIG_PLATFORM_UBUNTU"]):
+                            ["CONFIG_PLATFORM_UBUNTU"], ["AICWF_USB_SUPPORT"], build):
+                if chipdir(defines):
+                    defines = defines + ["EXPECT_CHIPDIR"]
                 with self.subTest(module=module, defines=defines):
                     with tempfile.TemporaryDirectory(prefix="aic-fw-request-") as temp:
                         c_file, binary = Path(temp) / "test.c", Path(temp) / "test"