chore: address review feedback on mempool compatibility fix

Author: Copilot

src/nimble/porting/nimble/include/os/os_mempool.h

@@ -39,7 +39,7 @@
 #if defined(ESP_ARDUINO_VERSION)
 #define NIMBLE_OS_MEMPOOL_USE_ROM_R_PREFIX (ESP_ARDUINO_VERSION < ESP_ARDUINO_VERSION_VAL(3, 3, 11))
 #else
-#define NIMBLE_OS_MEMPOOL_USE_ROM_R_PREFIX (1)
+#define NIMBLE_OS_MEMPOOL_USE_ROM_R_PREFIX 1
 #endif
 
 #ifdef __cplusplus