sphinx-key: disable hardware aes acceleration

we otherwise hit the error below, when parsing mainnet block 812548:

Timed out waiting for completion of AES Interrupt
https://github.com/espressif/esp-idf/issues/10647

This measure does not incur a memory, or latency cost

sphinx-key/sdkconfig.defaults

@@ -22,6 +22,8 @@ CONFIG_MBEDTLS_DYNAMIC_FREE_CA_CERT=y
 CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT=y
 CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES=n
 
+CONFIG_MBEDTLS_HARDWARE_AES=n
+
 # All these settings below sum to a 60KB reduction in bin size
 CONFIG_MBEDTLS_HAVE_TIME=n
 CONFIG_MBEDTLS_ECDSA_DETERMINISTIC=n