ASoC: rockchip: Use guard() for spin locks

bui duc phuc <phucduc.bui@gmail.com> says:

This series converts spinlock handling in the Rockchip sound drivers
to use guard() helpers.
The changes are code cleanup only and should have no functional impact.

Link: https://patch.msgid.link/20260604033554.96996-1-phucduc.bui@gmail.com

diff --cc sound/soc/rockchip/rockchip_i2s.c
Simple merge

diff --cc sound/soc/rockchip/rockchip_i2s_tdm.c
Simple merge