boot_serial: espressif: enable erase progressively option on serial recovery

Signed-off-by: Almir Okato <almir.okato@espressif.com>
diff --git a/boot/espressif/port/esp32/bootloader.conf b/boot/espressif/port/esp32/bootloader.conf
index c374e13..67a4d14 100644
--- a/boot/espressif/port/esp32/bootloader.conf
+++ b/boot/espressif/port/esp32/bootloader.conf
@@ -15,6 +15,9 @@
 # Enables the MCUboot Serial Recovery, that allows the use of
 # MCUMGR to upload a firmware through the serial port
 # CONFIG_ESP_MCUBOOT_SERIAL=y
+# Use sector erasing instead of entire image size erasing
+# when uploading through Serial Recovery
+# CONFIG_ESP_MCUBOOT_ERASE_PROGRESSIVELY=y
 # GPIO used to boot on Serial Recovery
 # CONFIG_ESP_SERIAL_BOOT_GPIO_DETECT=32
 # GPIO input type (0 for Pull-down, 1 for Pull-up)