bootutil: Close flash_area after failure to read swap information
bootutil: Close flash_area after failure to read swap information

Signed-off-by: Gustavo Henrique Nihei <42b1270cfd1a4f11d4db08d9d441d5d8452cd3b6@espressif.com>

ATmobica/mcuboot,ATmobica/mcuboot,ATmobica/mcuboot,ATmobica/mcuboot,ATmobica/mcuboot