radv: fix missing initialization of the conditional rendering state

This was missing when VK_EXT_conditional_rendering has been
implemented. The predication type should be -1 to avoid
restoring previous state when performing a decompression pass
with DCC enabled.

Note that we don't have to handle secondary command buffers
because we don't support this feature currently.

CC: 18.2 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/vulkan/radv_cmd_buffer.c

@@ -2307,6 +2307,7 @@ VkResult radv_BeginCommandBuffer(
 	cmd_buffer->state.last_num_instances = -1;
 	cmd_buffer->state.last_vertex_offset = -1;
 	cmd_buffer->state.last_first_instance = -1;
+	cmd_buffer->state.predication_type = -1;
 	cmd_buffer->usage_flags = pBeginInfo->flags;
 
 	/* setup initial configuration into command buffer */