pvr: include pvr_csb.h first in implementation

This just makes sure the header file is free-standing.

Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37675>

src/imagination/vulkan/pvr_csb.c

@@ -27,6 +27,8 @@
  * SOFTWARE.
  */
 
+#include "pvr_csb.h"
+
 #include <assert.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -35,7 +37,6 @@
 
 #include "hwdef/rogue_hw_utils.h"
 #include "pvr_bo.h"
-#include "pvr_csb.h"
 #include "pvr_debug.h"
 #include "pvr_device.h"
 #include "pvr_device_info.h"