mGUI: Game Boy Player feature support

CHANGES

@@ -10,6 +10,7 @@ Features:
  - Stack tracing tools in ARM debugger (by ahigerd)
  - Command scripts for CLI debugger (by ahigerd)
  - ARM disassembler now resolves addresses to symbol names
+ - Add Game Boy Player feature support to ports
 Emulation fixes:
  - ARM: Fix ALU reading PC after shifting
  - ARM: Fix STR storing PC after address calculation

src/feature/gui/gui-config.c

@@ -130,6 +130,7 @@ void mGUIShowConfig(struct mGUIRunner* runner, struct GUIMenuItem* extra, size_t
 		.title = "Select SGB BIOS path",
 		.data = "sgb.bios",
 	};
+#endif
 	*GUIMenuItemListAppend(&menu.items) = (struct GUIMenuItem) {
 		.title = "Interframe blending",
 		.data = "interframeBlending",
@@ -140,6 +141,19 @@ void mGUIShowConfig(struct mGUIRunner* runner, struct GUIMenuItem* extra, size_t
 		},
 		.nStates = 2
 	};
+#if defined(M_CORE_GBA) && (defined(GEKKO) || defined(__SWITCH__) || defined(PSP2))
+	*GUIMenuItemListAppend(&menu.items) = (struct GUIMenuItem) {
+		.title = "Enable GBP features",
+		.data = "gba.forceGbp",
+		.submenu = 0,
+		.state = false,
+		.validStates = (const char*[]) {
+			"Off", "On"
+		},
+		.nStates = 2
+	};
+#endif
+#ifdef M_CORE_GB
 	*GUIMenuItemListAppend(&menu.items) = (struct GUIMenuItem) {
 		.title = "Enable SGB features",
 		.data = "sgb.model",