Merge branch 'bugfix/free_acl_rx_buf_in_em_4_2' into 'release/v4.2'

Free ACL RX Buf in EM when disconnection [backport v4.2]

See merge request espressif/esp-idf!11612
This commit is contained in:
Jiang Jiang Jian
2020-12-17 16:47:46 +08:00