gallium: call util_cpu_detect()

Fix undefined behavior from using util_cpu_caps.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9311>

src/gallium/auxiliary/pipe-loader/pipe_loader.c

@@ -27,6 +27,7 @@
 
 #include "pipe_loader_priv.h"
 
+#include "util/u_cpu_detect.h"
 #include "util/u_inlines.h"
 #include "util/u_memory.h"
 #include "util/u_string.h"
@@ -151,6 +152,7 @@ pipe_loader_create_screen(struct pipe_loader_device *dev)
 {
    struct pipe_screen_config config;
 
+   util_cpu_detect();
    pipe_loader_load_options(dev);
    config.options = &dev->option_cache;