VIA southbridge K8T890: Apply un-written naming rules

Use separate Kconfig option to select a driver directory for
build and the specific type of southbridge to support.

Change-Id: I9482d4ea0f0234b9b7ff38144e45022ab95cf3f3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/685
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/southbridge/via/Makefile.inc b/src/southbridge/via/Makefile.inc
index 3c0160a..8bc9296 100644
--- a/src/southbridge/via/Makefile.inc
+++ b/src/southbridge/via/Makefile.inc
@@ -1,9 +1,5 @@
-subdirs-$(CONFIG_SOUTHBRIDGE_VIA_K8T800_OLD) += k8t890 # lspci lists B188 and 3188
-subdirs-$(CONFIG_SOUTHBRIDGE_VIA_K8T800) += k8t890     # lspci lists 0282, 1282, 2282, 3282, and 7282
-subdirs-$(CONFIG_SOUTHBRIDGE_VIA_K8T800PRO) += k8t890  # lspci lists 0282, 1282, 2282, 3282, and 7282
-subdirs-$(CONFIG_SOUTHBRIDGE_VIA_K8M800) += k8t890
 subdirs-$(CONFIG_SOUTHBRIDGE_VIA_K8T890) += k8t890
-subdirs-$(CONFIG_SOUTHBRIDGE_VIA_K8M890) += k8t890
 subdirs-$(CONFIG_SOUTHBRIDGE_VIA_VT8231) += vt8231
 subdirs-$(CONFIG_SOUTHBRIDGE_VIA_VT8235) += vt8235
 subdirs-$(CONFIG_SOUTHBRIDGE_VIA_VT8237R) += vt8237r
+