fix(dts): avoid upstream LLCC68 binding collision

Rename the application-owned LLCC68 devicetree compatible to semtech,llcc68-weihua so Zephyr releases with a native semtech,llcc68 binding can coexist with this custom driver module.

Use the registered semtech vendor prefix and a project-specific device suffix; DT_DRV_COMPAT maps to semtech_llcc68_weihua.

drivers/llcc68/llcc68_raw.c

@@ -3,7 +3,7 @@
 #include <errno.h>
 #include <zephyr/sys/util.h>
 
-#define DT_DRV_COMPAT semtech_llcc68
+#define DT_DRV_COMPAT semtech_llcc68_weihua
 
 static void dio1_irq_trampoline(const struct device *port, struct gpio_callback *cb, uint32_t pins) {
 	ARG_UNUSED(port);
@@ -66,4 +66,3 @@ BUILD_ASSERT(DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT),
 			 "No status=okay nodes for DT_DRV_COMPAT; check compatible/status");
 
 DT_INST_FOREACH_STATUS_OKAY(LLCC68_DEFINE)
-