egl: drop EGL driver `name`

egl: drop EGL driver `name`

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.

Cc: Kai Wasserbäch <kai@dev.carbon-project.org>
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>