pan_bo.h: add time.h include for time_t

Fixes:

  ../src/gallium/drivers/panfrost/pan_bo.h:93:9: error: unknown type name ‘time_t’

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4279>
diff --git a/src/panfrost/encoder/pan_bo.h b/src/panfrost/encoder/pan_bo.h
index fc20cee..7773b2b 100644
--- a/src/panfrost/encoder/pan_bo.h
+++ b/src/panfrost/encoder/pan_bo.h
@@ -29,6 +29,7 @@
 #include <panfrost-misc.h>
 #include "util/list.h"
 #include "pan_device.h"
+#include <time.h>
 
 /* Flags for allocated memory */