arm64: dts: qcom: hamoa/x1: fix idle exit latency

arm64: dts: qcom: hamoa/x1: fix idle exit latency

Designs based on the Qualcomm X1 Hamoa reference platform report:
driver: Idle state 1 target residency too low

This is because the declared X1 idle entry plus exit latency of 680us
exceeds the declared minimum 600us residency time:
  entry-latency-us = <180>;
  exit-latency-us = <500>;
  min-residency-us = <600>;

Fix this to be 320us so the sum of the entry and exit latencies matches
the downstream 500us exit latency, as directed by Maulik.

Tested on a Lenovo Yoga Slim 7x with Qualcomm X1E-80-100.

Fixes: 2e65616ef07f ("arm64: dts: qcom: x1e80100: Update C4/C5 residency/exit numbers")
Signed-off-by: Daniel J Blueman <daniel@quora.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260220124626.8611-1-daniel@quora.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>