cpu/esp32: add RTM feature

cpu/esp32/Kconfig

@@ -39,6 +39,11 @@ config HAS_ESP_HW_COUNTER
         Indicates that the used ESP32x SoC supports HW counters that can be
         used as timers.
 
+config HAS_ESP_RMT
+    bool
+    help
+        Indicates that the ESP32x SoC has a RMT peripheral.
+
 config HAS_ESP_RTC_TIMER_32K
     bool
     help

cpu/esp32/Kconfig.esp32

@@ -16,6 +16,7 @@ config CPU_FAM_ESP32
     select HAS_ESP_BLE
     select HAS_ESP_BLE_ESP32
     select HAS_ESP_HW_COUNTER
+    select HAS_ESP_RMT
     select HAS_ESP_WIFI_ENTERPRISE
     select HAS_PERIPH_FLASHPAGE
     select HAS_PERIPH_FLASHPAGE_IN_ADDRESS_SPACE

cpu/esp32/Kconfig.esp32c3

@@ -17,6 +17,7 @@ config CPU_FAM_ESP32C3
     select HAS_BLE_PHY_2MBIT
     select HAS_ESP_BLE
     select HAS_ESP_BLE_ESP32C3
+    select HAS_ESP_RMT
     select HAS_ESP_WIFI_ENTERPRISE
     select HAS_PERIPH_FLASHPAGE
     select HAS_PERIPH_FLASHPAGE_IN_ADDRESS_SPACE

cpu/esp32/Kconfig.esp32s2

@@ -12,6 +12,7 @@ config CPU_FAM_ESP32S2
     select HAS_ARCH_ESP32
     select HAS_CPU_ESP32
     select HAS_ESP_HW_COUNTER
+    select HAS_ESP_RMT
     select HAS_ESP_WIFI_ENTERPRISE
     select HAS_PERIPH_FLASHPAGE
     select HAS_PERIPH_FLASHPAGE_IN_ADDRESS_SPACE

cpu/esp32/Kconfig.esp32s3

@@ -17,6 +17,7 @@ config CPU_FAM_ESP32S3
     select HAS_BLE_PHY_2MBIT
     select HAS_ESP_BLE
     select HAS_ESP_BLE_ESP32C3
+    select HAS_ESP_RMT
     select HAS_ESP_HW_COUNTER
     select HAS_ESP_WIFI_ENTERPRISE
     select HAS_PERIPH_FLASHPAGE

cpu/esp32/Makefile.features

@@ -16,6 +16,7 @@ endif
 include $(RIOTCPU)/esp_common/Makefile.features
 
 FEATURES_PROVIDED += arch_esp32
+FEATURES_PROVIDED += esp_rmt
 FEATURES_PROVIDED += esp_wifi_enterprise
 FEATURES_PROVIDED += periph_flashpage
 FEATURES_PROVIDED += periph_flashpage_in_address_space