ANDROID: GKI: fix CRC changes in ttm_tt.c

In commit ef7efa60 ("drm/ttm: Make sure the mapped tt pages are
decrypted when needed"), drm_device.h gets included, which changes some
CRC values of the exported functions in ttm_tt.c.  Fix this up by only
including that when NOT calculating the CRC values.

Fixes: ef7efa60 ("drm/ttm: Make sure the mapped tt pages are decrypted when needed")
Change-Id: I7692323d1d3ff619df250f4e87e786d2bd2b1a72
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>