egl: drop EGL driver `name`

egl: drop EGL driver `name`

This is a revert of Marek's 2cb9ab53dd3ae6850a26 revert.
It was needed to revert the previous commit, and didn't have any issue
itself.
--

The "DRI2" name was reported as confusing when printing EGL infos (one
user reported thinking DRI3 was not working on his X server), and the
only alternative is Haiku, which can only be used on a Haiku machine.

The name therefore doesn't add any information that the user wouldn't
know already, so let's just drop it.

Suggested-by: Emil Velikov <emil.l.velikov@gmail.com>
Related-to: b174a1ae720cb404738c ("egl: Simplify the "driver" interface")
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Kai Wasserbäch <kai@dev.carbon-project.org>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>