ALSA: aoa: avoid false-positive format truncation warning

clang warns about what it interprets as a truncated snprintf:

sound/aoa/soundbus/i2sbus/core.c:171:6: error: 'snprintf' will always be truncated; specified size is 6, but format string expands to at least 7 [-Werror,-Wformat-truncation-non-kprintf]

The actual problem here is that it does not understand the special
%pOFn format string and assumes that it is a pointer followed by
the string "OFn", which would indeed not fit.

Slightly increasing the size of the buffer to its natural alignment
avoids the warning, as it is now long enough for the correct and
the incorrect interprations.

Fixes: b917d58d ("ALSA: aoa: Convert to using %pOFn instead of device_node.name")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Message-ID: <20240326223825.4084412-9-arnd@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>