net: dsa: mt7530: unexport mt7530_switch_ops

net: dsa: mt7530: unexport mt7530_switch_ops

Commit cb675afcddbb ("net: dsa: mt7530: introduce separate MDIO driver")
exported mt7530_switch_ops for use from mt7530-mmio.c. Later in the
patch set, mt7530-mmio.c used mt7530_probe_common() to access the
mt7530_switch_ops still from mt7530.c - see commit 110c18bfed41 ("net:
dsa: mt7530: introduce driver for MT7988 built-in switch").

This proves that exporting mt7530_switch_ops was unnecessary, so
unexport it back.

Cc: DENG Qingfang <dqfext@gmail.com>
Cc: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Chester A. Unal <chester.a.unal@arinc9.com>
Link: https://patch.msgid.link/20251130131657.65080-2-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>