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: 2e65616 ("arm64: dts: qcom: x1e80100: Update C4/C5 residency/exit numbers")
Signed-off-by: Daniel J Blueman <[email protected]>
Reviewed-by: Konrad Dybcio <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>

Author: dblueman

arch/arm64/boot/dts/qcom/hamoa.dtsi

@@ -269,7 +269,7 @@
 				idle-state-name = "ret";
 				arm,psci-suspend-param = <0x00000004>;
 				entry-latency-us = <180>;
-				exit-latency-us = <500>;
+				exit-latency-us = <320>;
 				min-residency-us = <600>;
 			};
 		};