ALSA: atmel: Replace deprecated strcpy() with strscpy()

strcpy() is deprecated; use strscpy() instead. Use strscpy() to copy the
long name because there's no string to format with sprintf().

No functional changes intended.

Link: https://github.com/KSPP/linux/issues/88


Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20250522180111.12144-2-thorsten.blum@linux.dev


Signed-off-by: Takashi Iwai <tiwai@suse.de>