drm/i915: drop intel_dpio_phy.h include from VLV IOSF SB

vlv_iosf_sb.c no longer depends on enum dpio_phy from
intel_dpio_phy.h. Drop the include.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://lore.kernel.org/r/20250527114854.3687469-1-jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>