radv: Allow DCC & TC-compat HTILE with VK_IMAGE_CREATE_EXTENDED_USAGE_BIT.

radv: Allow DCC & TC-compat HTILE with VK_IMAGE_CREATE_EXTENDED_USAGE_BIT.

I misunderstood the flag when initially disabling. But this flag
only does something with mutable formats. If we have DCC and
mutable formats, the formats are close enough that the allowed
usage flags are not meaningfully different nor used during
allocation.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3424>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3424>