lnl: Disabele IMR context save/restore for LNL

The IMR context save/restore feature causes platform crash
on RVP board. This patch disables the feature to unblock testing on
RVP.

Signed-off-by: Jaroslaw Stelter <Jaroslaw.Stelter@intel.com>

app/boards/intel_adsp_ace20_lnl.conf

@@ -12,7 +12,7 @@ CONFIG_PM_DEVICE_RUNTIME=y
 CONFIG_PM_DEVICE_RUNTIME_EXCLUSIVE=n
 CONFIG_PM_DEVICE_POWER_DOMAIN=y
 CONFIG_PM_POLICY_CUSTOM=y
-CONFIG_ADSP_IMR_CONTEXT_SAVE=y
+CONFIG_ADSP_IMR_CONTEXT_SAVE=n
 
 CONFIG_POWER_DOMAIN=y
 CONFIG_POWER_DOMAIN_INTEL_ADSP=y