esp_hw_support: Removed deprecated CPU util functions

The following files were deleted:
- components/esp_hw_support/include/soc/cpu.h
- components/soc/esp32s3/include/soc/cpu.h

The following functions are deprecated:
- get_sp()

The following functions declared in soc/cpu.h are now moved to esp_cpu.h:
- esp_cpu_configure_region_protection()

The following functions declared in soc/cpu.h are now moved to components/xtensa/include/esp_cpu_utils.h:
- esp_cpu_process_stack_pc()

All files with soc/cpu.h inclusion are updated to include esp_cpu.h instead.

Signed-off-by: Sudeep Mohanty <sudeep.mohanty@espressif.com>

components/xtensa/include/esp_cpu_utils.h

@@ -0,0 +1,34 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _ESP_CPU_UTILS_H
+#define _ESP_CPU_UTILS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Fetch the PC value of the previous instruction
+ *
+ * @param pc PC value of the current backtrace frame
+ *
+ */
+static inline uint32_t esp_cpu_process_stack_pc(uint32_t pc)
+{
+    if (pc & 0x80000000) {
+        //Top two bits of a0 (return address) specify window increment. Overwrite to map to address space.
+        pc = (pc & 0x3fffffff) | 0x40000000;
+    }
+    //Minus 3 to get PC of previous instruction (i.e. instruction executed before return address)
+    return pc - 3;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _ESP_CPU_UTILS_H