package/c-periphery: bump version to 2.2.1

Since commit "cmake: add cmake build support"
(https://github.com/vsergeev/c-periphery/commit/952e1e906a5d65b78932128af24b7dbb8cce2e9dvsergeev/c-periphery@d0a973c

),
c-periphery implement cmake build, so use cmake-package instead of
generic-package. Due to this, it now builds a shared library, so we
drop the INSTALL_TARGET = NO.

The hash of the license file is updated due to an update in the
copyright year:

  - Copyright (c) 2014-2019 vsergeev / Ivan (Vanya) A. Sergeev
  + Copyright (c) 2014-2020 vsergeev / Ivan (Vanya) A. Sergeev

Signed-off-by: Joris Offouga <offougajoris@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>