media: atomisp: remove table duplication from dfs tables

The way atomisp_dfs_tables.h is defined, it ends by duplicating
all data structs there on both atomisp_v4l2.c and atomisp_cmd.c.

Change the logic in order to place the definitions only on a single
place.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>