ALSA: lx6464es: Fix duplicated SSID entries

PCI_DEVICE() macro itself defines SSID entries while we override them
after that.  Replace with a more appropriate macro, PCI_DEVICE_SUB()
to define all ID values properly.

Spotted by sparse:
  sound/pci/lx6464es/lx6464es.c:60:11: warning: Initializer entry defined twice
  sound/pci/lx6464es/lx6464es.c:61:12:   also defined here
  sound/pci/lx6464es/lx6464es.c:64:11: warning: Initializer entry defined twice
  sound/pci/lx6464es/lx6464es.c:65:12:   also defined here

Signed-off-by: Takashi Iwai <tiwai@suse.de>