Add GD32 device map and cleanup GD32 sources

Introduce a new `common/scripts/gd32/gd32.json` device definition map for GD32F303, GD32F207, and GD32F407/F450 identification data. In `lib-gd32`, replace the hardcoded system name length with a constexpr-backed value, keep `gd32.h` for IWYU, add a lint suppression for parameter order in `DelayUs`, and modernize the infinite loop to `while (true)`. Also remove the obsolete `lib-board/.clangd` file.

Author: vanvught

common/scripts/gd32/gd32.json

@@ -0,0 +1,31 @@
+{
+	"0414": {
+		"series": "GD32F303",
+		"uid_base" : "",
+		"flash": {
+			"256": "GD32F303XCXX"
+		}
+	},
+	"0418": {
+		"series": "GD32F207",
+		"flash": {
+			"1024": "GD32F207XRXX"
+		}
+	},
+	"0x0419": {
+		"series": "GD32F407/GD32F450",
+		"probes": {
+			"tli_apb2en_bit26": {
+				"address": "0x40021024",
+				"bit": 26,
+				"set": "GD32F450",
+				"clear": "GD32F407"
+			}
+		},
+		"flash": {
+			"GD32F407": {
+				"512": "GD32F407XEXX"
+			}
+		}
+	}
+}

lib-board/.clangd

@@ -29,6 +29,7 @@ namespace board {
 static constexpr float kCoreTemperatureMin = -40.0;
 static constexpr float kCoreTemperatureMax = +85.0;
 static constexpr const char kWebsite[] = "https://gd32-dmx.org";
+static constexpr char kSysName[] = "Embedded";
 
 const char* Website() {
     return kWebsite;
@@ -57,7 +58,7 @@ const char* CpuName(uint8_t& length) {
 }
 
 const char* SysName(uint8_t& length) {
-    length = 8;
-    return "Embedded";
+    length = sizeof(kSysName) - 1U;
+    return kSysName;
 }
 } // namespace board

lib-gd32/src/board.cpp

@@ -33,7 +33,7 @@
 #include <cstdint>
 #include <cassert>
 
-#include "gd32.h"
+#include "gd32.h" // IWYU pragma: keep
 
 static constexpr auto kTicksPerUs = (MCU_CLOCK_FREQ / 1000000U);
 
@@ -46,6 +46,7 @@ void UdelayInit() {
 }
 
 namespace timing {
+// NOLINTNEXTLINE(bugprone-easily-swappable-parameters)
 void DelayUs(uint32_t micros, uint32_t offset_micros) {
     const auto kTicks = micros * kTicksPerUs;
 
@@ -58,7 +59,7 @@ void DelayUs(uint32_t micros, uint32_t offset_micros) {
         ticks_previous = offset_micros;
     }
 
-    while (1) {
+    while (true) {
         const auto kTicksNow = DWT->CYCCNT;
 
         if (kTicksNow != ticks_previous) {