libdrm: fix packaging after last upgrade

libdrm: fix packaging after last upgrade

* 2.4.44 adds 2 more tests kmstest and vbltest which got packaged
  to PN, causing PKG rename and breaking upgrade path
  * check_data_file_clashes: Package libdrm wants to install file /usr/lib/libdrm.so.2
         But that file is already provided by package  * libdrm2
  * check_data_file_clashes: Package libdrm wants to install file /usr/lib/libdrm.so.2.4.0
         But that file is already provided by package  * libdrm2
  put them to PN-tests where they belong

(From OE-Core rev: 2c39ca5a6744de58013e9e43b9f6cc4efa66ece9)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>