Enable malloc on ESP32 BSP, specify ttwrplus battery type.

Mallocs now are working.
This radio sports a single cell Li-Po battery.

TG-553

platform/targets/ttwrplus/hwconfig.h

@@ -30,7 +30,6 @@
 #define SCREEN_HEIGHT DT_PROP(DISPLAY, height)
 #define PIX_FMT_BW
 
-/* TODO: battery type */
-#define BAT_NONE
+#define BAT_LIPO_1S
 
 #endif /* HWCONFIG_H */

platform/targets/ttwrplus/ttwrplus_defconfig

@@ -8,3 +8,5 @@ CONFIG_DYNAMIC_THREAD=y
 CONFIG_DYNAMIC_THREAD_STACK_SIZE=4096
 CONFIG_DYNAMIC_THREAD_PREFER_POOL=y
 CONFIG_DYNAMIC_THREAD_POOL_SIZE=4
+CONFIG_COMMON_LIBC_MALLOC=y
+CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=131072