[Telink] avoid using NEWLIB_LIBC (use PICOLIB)

Author: s07641069

config/telink/chip-module/Kconfig.defaults

@@ -86,10 +86,6 @@ config COMMON_LIBC_MALLOC_ARENA_SIZE
     default 20716 if SOC_RISCV_TELINK_TL321X || SOC_SERIES_RISCV_TELINK_B9X_RETENTION
     default 12288
 
-choice LIBC_IMPLEMENTATION
-	default NEWLIB_LIBC
-endchoice
-
 config MBEDTLS_ENTROPY_ENABLED
     bool
     default y

src/platform/telink/CHIPDevicePlatformConfig.h

@@ -145,6 +145,8 @@
 #if !defined(CONFIG_CHIP_MALLOC_SYS_HEAP) && defined(CONFIG_NEWLIB_LIBC)
 /// Use mallinfo() to obtain the heap usage statistics exposed by SoftwareDiagnostics cluster attributes.
 #define CHIP_DEVICE_CONFIG_HEAP_STATISTICS_MALLINFO 1
+#else
+#define CHIP_DEVICE_CONFIG_HEAP_STATISTICS_MALLINFO 0
 #endif // !defined(CONFIG_CHIP_MALLOC_SYS_HEAP) && defined(CONFIG_NEWLIB_LIBC)
 #endif // CHIP_DEVICE_CONFIG_HEAP_STATISTICS_MALLINFO