unit-test-app: fix chip-specific sdkconfig options

DEFAULT_CPU_FREQ and ULP_COPROC_ENABLED options have chip-specific
names, and should be set in a chip-specific sdkconfig.defaults file.
This commit also changes the default CPU frequency for ESP32S2 unit
tests to 240 MHz.

tools/unit-test-app/sdkconfig.defaults

@@ -6,8 +6,6 @@ CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partition_table_unit_test_app.csv"
 CONFIG_PARTITION_TABLE_FILENAME="partition_table_unit_test_app.csv"
 CONFIG_PARTITION_TABLE_OFFSET=0x8000
-CONFIG_ESP32_DEFAULT_CPU_FREQ_240=y
-CONFIG_ESP32_XTAL_FREQ_AUTO=y
 CONFIG_FREERTOS_HZ=1000
 CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK=y
 CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS=3
@@ -17,7 +15,6 @@ CONFIG_MBEDTLS_HARDWARE_MPI=y
 CONFIG_MBEDTLS_MPI_USE_INTERRUPT=y
 CONFIG_MBEDTLS_HARDWARE_SHA=y
 CONFIG_SPI_FLASH_ENABLE_COUNTERS=y
-CONFIG_ESP32_ULP_COPROC_ENABLED=y
 CONFIG_ESP_TASK_WDT=n
 CONFIG_SPI_FLASH_DANGEROUS_WRITE_FAILS=y
 CONFIG_FREERTOS_QUEUE_REGISTRY_SIZE=7

tools/unit-test-app/sdkconfig.defaults.esp32

@@ -0,0 +1,3 @@
+CONFIG_ESP32_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32_XTAL_FREQ_AUTO=y
+CONFIG_ESP32_ULP_COPROC_ENABLED=y

tools/unit-test-app/sdkconfig.defaults.esp32s2beta

@@ -1 +1,5 @@
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32S2_ULP_COPROC_ENABLED=y
+
+# Hardware MPI disabled, ref. IDF-757
 CONFIG_MBEDTLS_HARDWARE_MPI=n