sdkconfig: enable SPIRAM ECC

This will consume 1/16th of the SPI RAM, but even after enabling this we
have 11 out of 16MB free after boot, so we really don't have to worry
about running out of memory.

Author: stintel

sdkconfig.defaults

@@ -115,6 +115,7 @@ CONFIG_RMT_SUPPRESS_DEPRECATE_WARN=y
 CONFIG_SPIFFS_MAX_PARTITIONS=6
 CONFIG_SPIRAM=y
 CONFIG_SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY=y
+CONFIG_SPIRAM_ECC_ENABLE=y
 CONFIG_SPIRAM_FETCH_INSTRUCTIONS=y
 # CONFIG_SPIRAM_IGNORE_NOTFOUND is not set
 CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=0