feat(hal): graudate the PCNT hal driver into a new component

components/esp_hal_pcnt/pcnt_hal.c

@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// The HAL layer for PCNT (common part)
+
+#include "hal/pcnt_hal.h"
+#include "hal/pcnt_ll.h"
+
+void pcnt_hal_init(pcnt_hal_context_t *hal, int pcnt_num)
+{
+    //Get hardware instance.
+    hal->dev = PCNT_LL_GET_HW(pcnt_num);
+}