lnx/display: do no use DESTROY_DUMB to close GEM handles
lnx/display: do no use DESTROY_DUMB to close GEM handles

The handle we get is from PrimeFDToHandle (et al) which should be closed
via GEM_CLOSE. Using the DESTROY_DUMB ioctl is a violation.

Seemingly a copy/paste mistake from mesa, with the latter fixed as of
commit bd0c4e360d08dc1b1a1433530b389358623783bb

Signed-off-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>

GPUOpen-Drivers/pal,GPUOpen-Drivers/pal,googlestadia/pal,GPUOpen-Drivers/pal,GPUOpen-Drivers/pal,googlestadia/pal,googlestadia/pal