net: phy: linux/phy.h: fix Excess kernel-doc description warning

Remove the @phy_timer: line to prevent the kernel-doc warning:

include/linux/phy.h:768: warning: Excess struct member 'phy_timer' description in 'phy_device'

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Andrew Lunn <[e-mail]>
Cc: Heiner Kallweit <[e-mail]>
Cc: Russell King <[e-mail]>
Cc: [e-mail]
Reviewed-by: Russell King (Oracle) <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/linux/phy.h

···
  *      - Bits [31:24] are reserved for defining generic
  *        PHY driver behavior.
  * @irq: IRQ number of the PHY's interrupt (-1 if none)
- * @phy_timer: The timer for handling the state machine
  * @phylink: Pointer to phylink instance for this PHY
  * @sfp_bus_attached: Flag indicating whether the SFP bus has been attached
  * @sfp_bus: SFP bus attached to this PHY's fiber port