drm/i915/cx0: remove unnecessary includes

There's nothing in the header that requires the bit or bitfield
headers. Remove.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3e12f1d5ab17e501e4700044072fbb6dd9b2f459.1730146000.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_cx0_phy.h

@@ -7,8 +7,6 @@
 #define __INTEL_CX0_PHY_H__
 
 #include <linux/types.h>
-#include <linux/bitfield.h>
-#include <linux/bits.h>
 
 enum icl_port_dpll_id;
 struct drm_i915_private;