[nrf fromlist] soc: nordic: nrf54l: remove redundant ELV code

soc/nordic/nrf54l/CMakeLists.txt

@@ -7,10 +7,6 @@ zephyr_library_sources(
   )
 zephyr_include_directories(.)
 
-if(CONFIG_ELV_GRTC_LFXO_ALLOWED)
-  message(WARNING "WARNING! ELV mode feature is EXPERIMENTAL and may brick your device!")
-endif()
-
 # We need a buffer in memory in a static location which can be used by
 # the KMU peripheral. The KMU has a static destination address, we chose
 # this address to be 0x20000000, which is the first address in the SRAM.

soc/nordic/nrf54l/Kconfig

@@ -82,18 +82,4 @@ config SOC_NRF_FORCE_CONSTLAT
 	  of base resources on while in sleep. The advantage of having a constant
 	  and predictable latency will be at the cost of having increased power consumption.
 
-if NRF_GRTC_TIMER
-
-config ELV_GRTC_LFXO_ALLOWED
-	bool
-	depends on POWEROFF
-	select EXPERIMENTAL
-	help
-	  This feature allows using ELV mode when GRTC operates with the LFXO as
-	  a low-frequency clock source. The LFXO is automatically activated when
-	  preparing to system-off.
-	  WARNING! This feature is EXPERIMENTAL and may brick your device!
-
-endif # NRF_GRTC_TIMER
-
 endif # SOC_SERIES_NRF54LX

soc/nordic/nrf54l/soc.c

@@ -171,10 +171,6 @@ static inline void power_and_clock_configuration(void)
 #endif
 	nrf_regulators_vreg_enable_set(NRF_REGULATORS, NRF_REGULATORS_VREG_MAIN, true);
 #endif
-
-#if defined(CONFIG_ELV_GRTC_LFXO_ALLOWED)
-	nrf_regulators_elv_mode_allow_set(NRF_REGULATORS, NRF_REGULATORS_ELV_ELVGRTCLFXO_MASK);
-#endif /* CONFIG_ELV_GRTC_LFXO_ALLOWED */
 }
 #endif /* NRF_APPLICATION */