feat(gptimer): move gptimer retention info from esp_hal_timg to esp_driver_gptimer

- Add gptimer_priv.h with retention type definitions
- Create timer_periph.c files for 8 chips in esp_driver_gptimer
- Remove retention code from esp_hal_timg timer_periph.c (keep signals)

components/esp_driver_gptimer/CMakeLists.txt

@@ -8,6 +8,10 @@ set(public_include "include")
 if(CONFIG_SOC_GPTIMER_SUPPORTED)
     list(APPEND srcs "src/gptimer.c"
                      "src/gptimer_common.c")
+
+    if(CONFIG_SOC_PAU_SUPPORTED AND CONFIG_SOC_TIMER_SUPPORT_SLEEP_RETENTION)
+        list(APPEND srcs "${target}/timer_retention.c")
+    endif()
 endif()
 
 if(CONFIG_SOC_TIMER_SUPPORT_ETM)
@@ -18,6 +22,7 @@ set(requires esp_pm esp_hal_timg)
 
 idf_component_register(SRCS ${srcs}
                        INCLUDE_DIRS ${public_include}
+                       PRIV_INCLUDE_DIRS "src"
                        REQUIRES ${requires}
                        LDFRAGMENTS "linker.lf"
-                      )
+                       )