Vulkan guarantees only 4 byte alignment of offset for vkCmdDrawIndirect,
while CP_LOAD_STATE.EXT_SRC_ADDR requires 16 byte alignment which
makes us copy indirect parameters to a correctly aligned buffer.

Blob does essentially the same but emits indirect CP_LOAD_STATE
with src = SS6_UBO and EXT_SRC_ADDR = 0xe0000, and only for a
first dispatch.

Fixes:
dEQP-VK.compute.indirect_dispatch.*

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <mesa/mesa!8444>