Merge pull request #1558 from petermm/reenable-MBEDTLS_ECP_FIXED_POINT_OPTIM

ESP32: re-enable `MBEDTLS_ECP_FIXED_POINT_OPTIM`

**TL;DR: 0.6.5 shipped with `MBEDTLS_ECP_FIXED_POINT_OPTIM` enabled - as should
0.6.6.**

upstream have disabled the `MBEDTLS_ECP_FIXED_POINT_OPTIM` config across all
their recent 5.x.x releases, which was previously enabled.

> MbedTLS: MbedTLS option MBEDTLS_ECP_FIXED_POINT_OPTIM is disabled by default
to save on significant (~27KB) flash footprint. This allows easier migration
from IDF 4.x to 5.x release. If the performance is desired and ECC accelerator
is not available then the config can be turned on.

The reason is to save flash space and facilitate 4.x to 5.x migration.

These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).

SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later

Author: bettio

src/platforms/esp32/sdkconfig.defaults

@@ -1,2 +1,3 @@
 CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_MBEDTLS_ECP_FIXED_POINT_OPTIM=y

src/platforms/esp32/sdkconfig.release-defaults

@@ -1,4 +1,5 @@
 CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_MBEDTLS_ECP_FIXED_POINT_OPTIM=y
 CONFIG_COMPILER_OPTIMIZATION_PERF=y
 CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_SILENT=y

src/platforms/esp32/test/sdkconfig.ci.wokwi

@@ -5,3 +5,4 @@ CONFIG_AVM_RTC_SLOW_MAX_SIZE=1024
 CONFIG_ETH_USE_OPENETH=n
 CONFIG_COMPILER_OPTIMIZATION_PERF=y
 CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_SILENT=y
+CONFIG_MBEDTLS_ECP_FIXED_POINT_OPTIM=y

src/platforms/esp32/test/sdkconfig.defaults

@@ -4,3 +4,4 @@ CONFIG_ESPTOOLPY_FLASHSIZE_DETECT=n
 CONFIG_ESP_INT_WDT_TIMEOUT_MS=10000
 CONFIG_ETH_USE_OPENETH=y
 CONFIG_AVM_RTC_SLOW_MAX_SIZE=1024
+CONFIG_MBEDTLS_ECP_FIXED_POINT_OPTIM=y