i965: Make feature macros gen8 based

All the "features" of the hardware are similar starting with GEN8, so remove as
much of the GEN9 uniqueness as possible. This makes implementing future gen
platforms a bit easier.

Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/common/gen_device_info.c

@@ -388,15 +388,8 @@ static const struct gen_device_info gen_device_info_chv = {
    }
 };
 
-#define GEN9_FEATURES                               \
+#define GEN9_HW_INFO                                \
    .gen = 9,                                        \
-   .has_hiz_and_separate_stencil = true,            \
-   .has_resource_streamer = true,                   \
-   .must_use_separate_stencil = true,               \
-   .has_llc = true,                                 \
-   .has_pln = true,                                 \
-   .supports_simd16_3src = true,                    \
-   .has_surface_tile_offset = true,                 \
    .max_vs_threads = 336,                           \
    .max_gs_threads = 336,                           \
    .max_tcs_threads = 336,                          \
@@ -464,6 +457,10 @@ static const struct gen_device_info gen_device_info_chv = {
       },                                           \
    }
 
+#define GEN9_FEATURES                               \
+   GEN8_FEATURES,                                   \
+   GEN9_HW_INFO
+
 static const struct gen_device_info gen_device_info_skl_gt1 = {
    GEN9_FEATURES, .gt = 1,
    .num_slices = 1,