dpll: zl3073x: add ref sync and output clock type helpers

dpll: zl3073x: add ref sync and output clock type helpers

Add ZL_REF_SYNC_CTRL_MODE_REFSYNC_PAIR and ZL_REF_SYNC_CTRL_PAIR
register definitions.

Add inline helpers to get and set the sync control mode and sync pair
fields of the reference sync control register:

  zl3073x_ref_sync_mode_get/set() - ZL_REF_SYNC_CTRL_MODE field
  zl3073x_ref_sync_pair_get/set() - ZL_REF_SYNC_CTRL_PAIR field

Add inline helpers to get and set the clock type field of the output
mode register:

  zl3073x_out_clock_type_get/set() - ZL_OUTPUT_MODE_CLOCK_TYPE field

Convert existing esync callbacks to use the new helpers.

Reviewed-by: Petr Oros <poros@redhat.com>
Reviewed-by: Prathosh Satish <Prathosh.Satish@microchip.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Link: https://patch.msgid.link/20260408102716.443099-4-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>