rt721: enable capture switches by default

alsa-project/alsa-ucm-conf pull request #806 was edited from BenSharir:

Enable FU0F and FU1E capture switches in the RT721 init sequence.
Without these, DMIC and headset microphone capture is muted by default.

This matches the behavior of rt712 and rt713 codecs which both enable
their capture switches in init.conf.

**Hardware tested:**
- ASUS ProArt PX13 HN7306EAC
- AMD ACP70 SoundWire
- RT721 codec
- Card components: `cfg-amp:2 mic:acp-dmic cfg-mics:1 hs:rt721`

**System:**
- Fedora 44
- Kernel 7.0.13-200.fc44.x86_64
- alsa-ucm 1.2.16.1-1.fc44

**Before:** Microphone records silence; `amixer` shows:
- `rt721 FU0F Capture Switch`: off,off
- `rt721 FU1E Capture Switch`: off,off,off,off

**After:** Microphone works; switches enabled by default.

Fixes: #805

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/806
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/806.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf