anv/device: Set the compressed texture feature flags correctly

anv/device: Set the compressed texture feature flags correctly

Sampling from an ETC2 texture is supported on Bay Trail and
from Gen8 onwards. While ASTC_LDR is supported on Gen9, the
logic to handle such formats has not yet been implemented in
the driver.

Fixes dEQP-VK.api.info.format_properties.compressed_formats.

v2: Enable ETC2 for Bay Trail (Kenneth Graunke)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94896
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>