net: phy: aquantia: rename some aqr107 functions according to generation

Establish a more intuitive function naming convention in this driver.
A GenX PHY must only call aqr_genY_ functions, where Y <= X.

Loosely speaking, aqr107_ is representative of Gen2 and above, except for:
- aqr107_config_init()
- aqr107_suspend()
- aqr107_resume()
- aqr107_wait_processor_intensive_op()

which are also called by AQR105, so these are renamed to Gen1.

Actually aqr107_config_init() is renamed to aqr_gen1_config_init() when
called by AQR105, and aqr_gen2_config_init() when called by all other
PHYs. The Gen2 function calls the Gen1 function, so there is no
functional change. This prefaces further Gen2-specific initialization
steps which must be omitted for AQR105. These will be added to
aqr_gen2_config_init().

In fact, many PHY drivers call an aqr*_config_init() beneath their
generation's feature set: AQR114C is a Gen4 PHY which calls
aqr_gen2_config_init(), even though AQR113C, also a Gen4 PHY which
differs only in maximum link speed, calls the richer
aqr113c_config_init() which also sets phydev->possible_interfaces.
Many of the more subtle inconsistencies of this kind will be fixed up in
later changes.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20250821152022.1065237-5-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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