misc: microchip: pci1xxxx: Fix a memory leak in the error handling of gp_aux_bus_probe()

There is a memory leak (forget to free allocated buffers) in a
memory allocation failure path.

Fix it to jump to the correct error handling code.

Fixes: 393fc2f5

 ("misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in the multi-function endpoint of pci1xxxx device.")
Signed-off-by: Yongzhi Liu <hyperlyzcs@gmail.com>
Reviewed-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>
Link: https://lore.kernel.org/r/20240523121434.21855-4-hyperlyzcs@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>