modules: littlefs: use ##__VA_ARGS__ for littlefs log wrappers
modules: littlefs: use ##__VA_ARGS__ for littlefs log wrappers

LittleFS has some macros resolving to the Zephyr LOG_* ones, use
the ##__VA_ARGS__ for these so that they don't leave a trailing comma if
called with a single argument.

Signed-off-by: Fabio Baltieri <1c55e39c05d9ab42261288cf330256b2af6ba179@google.com>

galak/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr