cavium/liquidio: Remove unused lio_get_device_id

lio_get_device_id() has been unused since 2018's
commit 64fecd3 ("liquidio: remove obsolete functions and data
structures")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250203183343.193691-1-linux@treblig.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Dr. David Alan Gilbert

drivers/net/ethernet/cavium/liquidio/octeon_device.c

@@ -1433,22 +1433,6 @@ int octeon_wait_for_ddr_init(struct octeon_device *oct, u32 *timeout)
 }
 EXPORT_SYMBOL_GPL(octeon_wait_for_ddr_init);
 
-/* Get the octeon id assigned to the octeon device passed as argument.
- *  This function is exported to other modules.
- *  @param dev - octeon device pointer passed as a void *.
- *  @return octeon device id
- */
-int lio_get_device_id(void *dev)
-{
-	struct octeon_device *octeon_dev = (struct octeon_device *)dev;
-	u32 i;
-
-	for (i = 0; i < MAX_OCTEON_DEVICES; i++)
-		if (octeon_device[i] == octeon_dev)
-			return octeon_dev->octeon_id;
-	return -1;
-}
-
 void lio_enable_irq(struct octeon_droq *droq, struct octeon_instr_queue *iq)
 {
 	u64 instr_cnt;

drivers/net/ethernet/cavium/liquidio/octeon_device.h

@@ -705,13 +705,6 @@ octeon_get_dispatch(struct octeon_device *octeon_dev, u16 opcode,
  */
 struct octeon_device *lio_get_device(u32 octeon_id);
 
-/** Get the octeon id assigned to the octeon device passed as argument.
- *  This function is exported to other modules.
- *  @param dev - octeon device pointer passed as a void *.
- *  @return octeon device id
- */
-int lio_get_device_id(void *dev);
-
 /** Read windowed register.
  *  @param  oct   -  pointer to the Octeon device.
  *  @param  addr  -  Address of the register to read.