[ALSA] emu10k1 - Don't create emu1010 controls for non-emu boards

The last change for emu1616 introduced a bug that the driver creates
emu1010-related controls even on non-emu boards.  Fixed now.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>