samples: net: aws_iot: Fix Flash overflow

Enable LTO to fix flash overflow.

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

samples/net/aws_iot/boards/nrf7002dk_nrf5340_cpuapp_ns.conf

@@ -109,3 +109,7 @@ CONFIG_TLS_CREDENTIALS_BACKEND_PROTECTED_STORAGE=y
 CONFIG_TFM_PROFILE_TYPE_SMALL=y
 CONFIG_PM_PARTITION_SIZE_TFM_SRAM=0xc000
 CONFIG_PM_PARTITION_SIZE_TFM=0x1fe00
+
+# Enable LTO to save flash memory
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y