spi_flash: Support suspend/resume mode for operations

- Adds arbitration between the erase and write in suspend mode
     (If the flash memory is suspended then only a read operation can be performed.)
- espcoredump: Dump does not use suspend feature, just resume before continue.
- spi_flash: Add release_cpu() to do suspend/release_cpu/resume

components/soc/esp32s2/include/soc/spi_mem_struct.h

@@ -266,7 +266,7 @@ typedef volatile struct spi_mem_dev_s {
         };
         uint32_t val;
     } fsm;
-    uint32_t data_buf[18];                                                /*data buffer*/
+    uint32_t data_buf[16];                                                /*data buffer*/
     union {
         struct {
             uint32_t waiti_en:             1;                   /*auto-waiting flash idle operation when program flash or erase flash. 1: enable 0: disable.*/

components/spi_flash/Kconfig

@@ -124,6 +124,7 @@ menu "SPI Flash driver"
     config SPI_FLASH_YIELD_DURING_ERASE
         bool "Enables yield operation during flash erase"
         default y
+        depends on SPI_FLASH_USE_LEGACY_IMPL
         help
             This allows to yield the CPUs between erase commands.
             Prevents starvation of other tasks.
@@ -137,7 +138,7 @@ menu "SPI Flash driver"
             then it will yield CPUs after finishing a current command.
 
     config SPI_FLASH_ERASE_YIELD_TICKS
-        int "CPU release time (tick)"
+        int "CPU release time (tick) for an erase operation"
         depends on SPI_FLASH_YIELD_DURING_ERASE
         default 1
         help

components/spi_flash/private_include/spi_flash_defs.h

@@ -47,6 +47,8 @@
 #define CMD_LARGE_BLOCK_ERASE_4B 0xDC /* 64KB block erase command */
 #define CMD_PROGRAM_PAGE        0x02
 #define CMD_PROGRAM_PAGE_4B     0x12
+#define CMD_SUSPEND     0x75
+#define CMD_RESUME      0x7A
 
 #define CMD_RST_EN      0x66
 #define CMD_RST_DEV     0x99