Fix memory leak in P256 code

Free OpenSSL structures correctly using std::unique_ptr.

Bug: none
Test: valgrind doesn't complain
Change-Id: I6734810c880dada8a17cf6e40918584818c8f9d0
1 file changed
tree: f207530e278902945a9f64089ebd82316891554c
  1. atap/
  2. MODULE_LICENSE_APACHE2
  3. NOTICE