ALSA: memalloc: Drop snd_dma_pci_data() macro

Now that all users have been converted, we can drop snd_dma_pci_data()
macro definition.

Link: https://lore.kernel.org/r/20191108164637.1110-1-tiwai@suse.de


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