samples: boards: mec15xxevb: pm: Enable PECI and KSCAN drivers

Enable PECI and KSCAN drivers to evaluate any side-effect
in LPM entry/exit and power consumption.

Signed-off-by: Jose Alberto Meza <[email protected]>

Author: albertofloyd

samples/boards/mec15xxevb_assy6853/power_management/prj.conf

@@ -6,4 +6,9 @@ CONFIG_LOG_PROCESS_THREAD_SLEEP_MS=2100
 
 CONFIG_THREAD_NAME=y
 # Enable PM debug in MEC1501 this will give indication in MCHP_060
+
+# This consumes additional power (VTR_PLL)
 CONFIG_PM_DEBUG=y
+# Enable additional drivers to evaluate power consumption without activity
+CONFIG_PECI=y
+CONFIG_KSCAN=y