drm/i915: remove circ_buf.h includes

The last user of macros from that include was removed in 2018 by the
commit below.

Fixes: 6cc42152 ("drm/i915: Remove support for legacy debugfs crc interface")
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221115070302.4064-1-jirislaby@kernel.org

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

@@ -24,7 +24,6 @@
  *
  */
 
-#include <linux/circ_buf.h>
 #include <linux/ctype.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>

drivers/gpu/drm/i915/i915_irq.c

@@ -28,7 +28,6 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
-#include <linux/circ_buf.h>
 #include <linux/slab.h>
 #include <linux/sysrq.h>