1、【完善】一处注释说明。

Signed-off-by: armink <armink.ztl@gmail.com>

easyflash/src/easyflash.c

@@ -46,12 +46,11 @@
  *       1.Normal mode: no more limitations
  *       2.Wear leveling mode: system section will used an flash section and the data section will used at least 2 flash sections
  *       3.Power fail safeguard mode: ENV area will has an backup. It is twice as normal mode.
- *       4.wear leveling and power fail safeguard mode: The system section will used an flash section.
- *         The data section is twice as wear leveling mode data section size.
+ *       4.wear leveling and power fail safeguard mode: The required capacity will be 2 times the total capacity in wear leveling mode.
  *       For example:
  *       The EF_ERASE_MIN_SIZE is 128K and the ENV_USER_SETTING_SIZE: 2K. The ENV_AREA_SIZE in different mode you can define
  *       1.Normal mode: 1*EF_ERASE_MIN_SIZE
- *       2.Wear leveling mode: 3*EF_ERASE_MIN_SIZE (It has 2 flash section to store ENV. So ENV can erase at least 200,000 times)
+ *       2.Wear leveling mode: 3*EF_ERASE_MIN_SIZE (It has 2 data section to store ENV. So ENV can erase at least 200,000 times)
  *       3.Power fail safeguard mode: 2*EF_ERASE_MIN_SIZE
  *       4.Wear leveling and power fail safeguard mode: 6*EF_ERASE_MIN_SIZE
  * @note the log area size must be more than twice of EF_ERASE_MIN_SIZE