drm/ttm: give resource functions their own [ch] files

This is a separate object we work within TTM.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/384338/?series=80346&rev=1
11 files changed