drm/i915/fbc: replace GEM_BUG_ON() to drm_WARN_ON()

Avoid using GEM_BUG_ON() in display code.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a7d53a403822b43c7d78689a10480b47ccc0534d.1694684044.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_fbc.c

@@ -333,10 +333,12 @@ static void i8xx_fbc_program_cfb(struct intel_fbc *fbc)
 {
 	struct drm_i915_private *i915 = fbc->i915;
 
-	GEM_BUG_ON(range_overflows_end_t(u64, i915_gem_stolen_area_address(i915),
+	drm_WARN_ON(&i915->drm,
+		    range_overflows_end_t(u64, i915_gem_stolen_area_address(i915),
 					  i915_gem_stolen_node_offset(&fbc->compressed_fb),
 					  U32_MAX));
-	GEM_BUG_ON(range_overflows_end_t(u64, i915_gem_stolen_area_address(i915),
+	drm_WARN_ON(&i915->drm,
+		    range_overflows_end_t(u64, i915_gem_stolen_area_address(i915),
 					  i915_gem_stolen_node_offset(&fbc->compressed_llb),
 					  U32_MAX));
 	intel_de_write(i915, FBC_CFB_BASE,