spi_flash: Add ESP32-C3 support

Based on internal commit 3ef01301fff

components/spi_flash/esp32c3/spi_flash_rom_patch.c

@@ -0,0 +1,26 @@
+// Copyright 2015-2020 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 "sdkconfig.h"
+#include "esp32c3/rom/spi_flash.h"
+#include "soc/spi_periph.h"
+#include "spi_flash_defs.h"
+
+#define SPI_IDX   1
+
+esp_rom_spiflash_result_t esp_rom_spiflash_write_disable(void)
+{
+    REG_WRITE(SPI_MEM_CMD_REG(SPI_IDX), SPI_MEM_FLASH_WRDI);
+    while (READ_PERI_REG(PERIPHS_SPI_FLASH_CMD) != 0);
+    return ESP_ROM_SPIFLASH_RESULT_OK;
+}