arm64: dts: qcom: sm8250-mtp: fix reset line polarity

The driver for the codec, when resetting the chip, first drives the line
low, and then high. This means that the line is active low. Change the
annotation in the DTS accordingly.

Fixes: 36c9d012 ("arm64: dts: qcom: use GPIO flags for tlmm")
Fixes: 5a263cf6 ("arm64: dts: qcom: sm8250-mtp: Add wcd9380 audio codec node")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221027074652.1044235-3-dmitry.torokhov@gmail.com