Fix macro redifinition warning for NuttX

[yamt]

Fix the following warning introduced by the recent change.

In file included from wamr/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/locking.h:17,
                 from wamr/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.h:18,
                 from wamr/core/iwasm/aot/../common/wasm_runtime_common.h:18,
                 from wamr/core/iwasm/aot/aot_runtime.h:10,
                 from wamr/core/iwasm/aot/aot_loader.c:6:
wamr/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h:55: error: "CONFIG_HAS_ISATTY" redefined [-Werror]
 #define CONFIG_HAS_ISATTY 1

In file included from wamr/core/shared/utils/../platform/include/platform_common.h:13,
                 from wamr/core/shared/utils/bh_platform.h:9,
                 from wamr/core/iwasm/aot/aot_runtime.h:9,
                 from wamr/core/iwasm/aot/aot_loader.c:6:
wamr/core/shared/platform/nuttx/platform_internal.h:75: note: this is the location of the previous definition
 #define CONFIG_HAS_ISATTY 0