lnl: workaround for L3_HEAP init failure on LNL

The L3_HEAP initialisation fails on LNL platform. This patch
changes z_heap structure what prevents the issue. This is
only temporary w/a not a real fix.

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

app/boards/intel_adsp_ace20_lnl.conf

@@ -13,6 +13,7 @@ CONFIG_PM_DEVICE_RUNTIME_EXCLUSIVE=n
 CONFIG_PM_DEVICE_POWER_DOMAIN=y
 CONFIG_PM_POLICY_CUSTOM=y
 CONFIG_ADSP_IMR_CONTEXT_SAVE=y
+CONFIG_SYS_HEAP_RUNTIME_STATS=y
 
 CONFIG_POWER_DOMAIN=y
 CONFIG_POWER_DOMAIN_INTEL_ADSP=y