[PATCH 3/4] drm/xe: Drop usage of TIMESTAMP_OVERRIDE

[kernel test robot]

Hi Matt,

kernel test robot noticed the following build warnings:

[auto build test WARNING on next-20250220]
[cannot apply to drm-xe/drm-xe-next v6.14-rc3 v6.14-rc2 v6.14-rc1 linus/master v6.14-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Matt-Roper/drm-i915-display-Make-refclk-fetching-logic-reusable/20250221-084058
base:   next-20250220
patch link:    https://lore.kernel.org/r/20250221003843.443559-9-matthew.d.roper%40intel.com
patch subject: [PATCH 3/4] drm/xe: Drop usage of TIMESTAMP_OVERRIDE
config: i386-buildonly-randconfig-003-20250221 (https://download.01.org/0day-ci/archive/20250221/202502211245.wEClyBRb-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250221/202502211245.wEClyBRb-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502211245.wEClyBRb-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/xe/xe_irq.c:12:
>> drivers/gpu/drm/xe/display/xe_display.h:77:12: warning: 'xe_display_get_refclk' defined but not used [-Wunused-function]
      77 | static u32 xe_display_get_refclk(struct xe_device *xe) { return 38400; }
         |            ^~~~~~~~~~~~~~~~~~~~~


vim +/xe_display_get_refclk +77 drivers/gpu/drm/xe/display/xe_display.h

    76	
  > 77	static u32 xe_display_get_refclk(struct xe_device *xe) { return 38400; }
    78	

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