fix(esp_hw_support): move linux spinlock.h to esp_hw_support/include/linux

Moved the linux spinlock.h stub into esp_hw_support/include/linux.
esp_hw_support's INCLUDE_DIRS already places include/linux before
include, so the correct include files are picked up for the linux
target.

- Drop the FreeRTOS-Kernel-SMP linux spinlock.h duplicate.
- rv_decode_test: use PRIV_REQUIRES esp_hw_support instead of
  hardcoding component include paths.

components/esp_gdbstub/test_gdbstub_host/rv_decode/main/CMakeLists.txt

@@ -5,10 +5,10 @@ idf_component_register(SRCS
                             "../../../private_include"
                             "../../../include"
                             "../../../src/port/riscv/include"
-                            "../../../../esp_hw_support/include"
                             "../../../../soc/esp32c3/include"
                             "../../../../esp_common/include"
                             "../../../../riscv/include"
+                       PRIV_REQUIRES esp_hw_support
                        WHOLE_ARCHIVE)
 
 # Currently 'main' for IDF_TARGET=linux is defined in freertos component.

components/freertos/FreeRTOS-Kernel-SMP/portable/linux/include/spinlock.h

@@ -1,59 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-/*
- * This file provides only very simple stubs to build IDF-based FreeRTOSes which use spinlocks on Linux.
- */
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define SPINLOCK_FREE          0xB33FFFFF
-#define SPINLOCK_WAIT_FOREVER  (-1)
-#define SPINLOCK_NO_WAIT        0
-#define SPINLOCK_INITIALIZER   {.owner = SPINLOCK_FREE,.count = 0}
-#define CORE_ID_REGVAL_XOR_SWAP (0xCDCD ^ 0xABAB)
-
-/**
- * @brief Spinlock object
- * Owner:
- *  - Set to 0 if uninitialized
- *  - Set to portMUX_FREE_VAL when free
- *  - Set to CORE_ID_REGVAL_PRO or CORE_ID_REGVAL_AP when locked
- *  - Any other value indicates corruption
- * Count:
- *  - 0 if unlocked
- *  - Recursive count if locked
- *
- * @note The simulator is single-core, hence, it doesn't have a proper spinlock implementation.
- * @note Keep portMUX_INITIALIZER_UNLOCKED in sync with this struct
- */
-typedef struct {
-    uint32_t owner;
-    uint32_t count;
-}spinlock_t;
-
-static inline void __attribute__((always_inline)) spinlock_initialize(spinlock_t *lock)
-{
-}
-
-static inline bool __attribute__((always_inline)) spinlock_acquire(spinlock_t *lock, int32_t timeout)
-{
-    return true;
-}
-
-static inline void __attribute__((always_inline)) spinlock_release(spinlock_t *lock)
-{
-}
-
-#ifdef __cplusplus
-}
-#endif