ALSA: emu10k1: make mixer control mass creation less wasteful

ALSA: emu10k1: make mixer control mass creation less wasteful

Define arrays of strings instead of snd_kcontrol_new.

While at it, move the E-MU source & destination enum defs next to their
hardware defs, which is a lot more logical and will come in handy in a
followup commit. And add some static asserts to verify that the array
sizes match.

This also applies the compactization from the previous commit to the
destination registers.
While reshuffling the arrays anyway, switch the order of the HAMOA_DAC
& HANA_SPDIF output destinations for the 1010 card, so they follow a
more regular pattern. This should have no functional impact.

The code is somewhat de-duplicated by the extraction of add_ctls().

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230516093612.3536508-4-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>