bootloader: shrink bin size

1. write a bootloader version of "getting chip revision" function.
2. reduce wordy log.

components/bootloader_support/include/bootloader_common.h

@@ -70,6 +70,13 @@ bool bootloader_common_erase_part_type_data(const char *list_erase, bool ota_dat
  */
 bool bootloader_common_label_search(const char *list, char *label);
 
+/**
+ * @brief Get chip revision
+ *
+ * @return Chip revision number
+ */
+uint8_t bootloader_common_get_chip_revision(void);
+
 /**
  * @brief Check if the image (bootloader and application) has valid chip ID and revision
  *