intr_alloc: split interrupt allocator into common-code and platform-code

esp_system: removed repeated interrupt allocator code and moved common code to esp_system

xtens: moved xtensa specific code from freertos to the xtensa component

hal/interrupt_controller: added interrupt controller hal and ll files

docs: update the doxyfile with new location of esp_itr_alloc.h file

xtensa: fixed dangerous relocation problem after moving xtensa interrupt files out of freertos

docs: removed Xtensa reference from intr_allocator api-reference

xtensa: pushed the interrupt function that manages non iram interrupts to the xtensa layer

esp_system/test: fixed platform dependent setting for intr_allocator tests

hal: rename the functions used to manage non iram interrupt mask.

components/hal/interrupt_controller_hal.c

@@ -0,0 +1,33 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "hal/interrupt_controller_hal.h"
+
+int_type_t interrupt_controller_hal_desc_type(int interrupt_number) 
+{
+    const int_desc_t *int_desc = interrupt_controller_hal_desc_table();
+    return(int_desc[interrupt_number].type);
+}
+
+int interrupt_controller_hal_desc_level(int interrupt_number)
+{
+    const int_desc_t *int_desc = interrupt_controller_hal_desc_table();
+    return(int_desc[interrupt_number].level);
+}
+
+int_desc_flag_t interrupt_controller_hal_desc_flags(int interrupt_number, int cpu_number) 
+{
+    const int_desc_t *int_desc = interrupt_controller_hal_desc_table();
+    return(int_desc[interrupt_number].cpuflags[cpu_number]);
+}