x86 MacMini: make built-in speaker sound actually work

The MacMini board table seems to largely look like any bog-standard
Intel 945 board.

Signed-off-by: Linus Torvalds <[e-mail]>

sound/pci/hda/patch_sigmatel.c

···
 	[STAC_REF] =	ref922x_pin_configs,
 	[STAC_D945GTP3] = d945gtp3_pin_configs,
 	[STAC_D945GTP5] = d945gtp5_pin_configs,
+	[STAC_MACMINI] = d945gtp5_pin_configs,
 	[STAC_D965_2112] = d965_2112_pin_configs,
 };