[nrf fromtree] platform: nordic_nrf: Fix SAU region limit off by one

The SAU region limit is inclusive and 32-byte aligned, so using the UICR base
as the limit makes the region cover the first 32 bytes of the UICR, which is
where UICR.APPROTECT lives. Use the last address before the UICR instead.

Change-Id: Ife5ba7c2e75c9571072ab176f63e4d8cbaa46d72
Signed-off-by: Dag Erik Gjørvad <dag.erik.gjorvad@nordicsemi.no>
(cherry picked from commit e6a1352bc557b3f65c73dae48ab18716702782e8)

Author: degjorva

platform/ext/target/nordic_nrf/common/core/target_cfg_54l.c

@@ -186,7 +186,7 @@ void sau_and_idau_cfg(void)
 	   non-secure NVM and before the UICR.*/
 	SAU->RNR = 0;
 	SAU->RBAR = (memory_regions.non_secure_partition_base & SAU_RBAR_BADDR_Msk);
-	SAU->RLAR = (NRF_UICR_S_BASE & SAU_RLAR_LADDR_Msk) | SAU_RLAR_ENABLE_Msk;
+	SAU->RLAR = ((NRF_UICR_S_BASE - 1) & SAU_RLAR_LADDR_Msk) | SAU_RLAR_ENABLE_Msk;
 
 	/* Leave SAU region 1 disabled until we find a use for it */
 

platform/ext/target/nordic_nrf/common/core/target_cfg_71.c

@@ -157,7 +157,7 @@ void sau_and_idau_cfg(void)
 	   non-secure NVM and before the UICR.*/
 	SAU->RNR = 0;
 	SAU->RBAR = (memory_regions.non_secure_partition_base & SAU_RBAR_BADDR_Msk);
-	SAU->RLAR = (NRF_UICR_S_BASE & SAU_RLAR_LADDR_Msk) | SAU_RLAR_ENABLE_Msk;
+	SAU->RLAR = ((NRF_UICR_S_BASE - 1) & SAU_RLAR_LADDR_Msk) | SAU_RLAR_ENABLE_Msk;
 
 	/* Leave SAU region 1 disabled until we find a use for it */