turnip: fix VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES

My attempt to be clever here backfired, it overwrites the pNext and stops
the loop (causing deqp to fail to query extension features after that).

Fixes: 62de79ac4492ac9e ("turnip: implement VK_KHR_shader_draw_parameters")

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5654>
1 file changed