anv/cmd_buffer: fix host memory leak

push_constants must be free'd.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100452
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: "17.0 13.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 1da7a11de8113932871487efaeb2674a3d1c644a)
[Emil Velikov: resolve trivial conflicts]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

Conflicts:
	src/intel/vulkan/anv_cmd_buffer.c
1 file changed