arm64: dts: qcom: sc7180-trogdor: Remove VBAT supply from rt5682s

These devicetrees override a rt5682 node to use the rt5682s compatible,
however, unlike rt5682, rt5682s doesn't have a VBAT supply. Remove the
inexistent supply in the rt5682s nodes.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221102182002.255282-9-nfraprado@collabora.com