net: phy: an8801: add support for more condition and issue fixes

[kevin-kw-huang]

Support configurations for:

1. MDI adding 5ohm surge protection
2. AN8801R output clock
3. Debugfs

[aspeedJacky]

@kevin-kw-huang

Got some error with this patch, please confirm it.

/work/linux/drivers/net/phy/an8801.c:769:6: error: no previous prototype for ‘update_r50_value’ [-Werror=missing-prototypes]
  769 | void update_r50_value(struct phy_device *phydev,
      |      ^~~~~~~~~~~~~~~~
/work/linux/drivers/net/phy/an8801.c:780:5: error: no previous prototype for ‘calculate_position’ [-Werror=missing-prototypes]
  780 | int calculate_position(int pos, int shift, int table_size)
      |     ^~~~~~~~~~~~~~~~~~
/work/linux/drivers/net/phy/an8801.c:788:5: error: no previous prototype for ‘process_r50’ [-Werror=missing-prototypes]
  788 | int process_r50(struct phy_device *phydev, int reg,
      |     ^~~~~~~~~~~
/work/linux/drivers/net/phy/an8801.c:804:5: error: no previous prototype for ‘an8801r_surge_protect_cfg’ [-Werror=missing-prototypes]
  804 | int an8801r_surge_protect_cfg(struct phy_device *phydev)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~
/work/linux/drivers/net/phy/an8801.c:1098:5: error: no previous prototype for ‘an8801r_info_show’ [-Werror=missing-prototypes]
 1098 | int an8801r_info_show(struct seq_file *seq, void *v)
      |     ^~~~~~~~~~~~~~~~~
/work/linux/drivers/net/phy/an8801.c:1154:5: error: no previous prototype for ‘an8801r_debugfs_init’ [-Werror=missing-prototypes]
 1154 | int an8801r_debugfs_init(struct phy_device *phydev)
      |     ^~~~~~~~~~~~~~~~~~~~

[aspeedJacky]

@kevin-kw-huang

It is done with two patches, but they are one thing on "net: phy: an8801: add support for more", so please merge the fix patch with the first patch to single patch for us. Thanks.

[kevin-kw-huang]

Merged the fix patch to the first patch.

[aspeedJacky]

@kevin-kw-huang Thanks.
This patch will be merged and released in next SDK version.

[kevin-kw-huang]

Got it, thanks.