AMD Geode cpus: apply un-written naming rules

Kconfig directives to select chip drivers for compile literally
match the chip directory names capitalized and underscored.

Rename directories and Kconfig as follows:
   model_lx  -> geode_lx
   model_gx1 -> geode_gx1
   model_gx2 -> geode_gx2

Change-Id: Ib8bf1e758b88f9efed1cf8b11c76b796388e7147
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/613
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/cpu/amd/Makefile.inc b/src/cpu/amd/Makefile.inc
index e695473..2ea376a 100644
--- a/src/cpu/amd/Makefile.inc
+++ b/src/cpu/amd/Makefile.inc
@@ -8,9 +8,9 @@
 subdirs-$(CONFIG_CPU_AMD_SOCKET_AM3) += socket_AM3
 subdirs-$(CONFIG_CPU_AMD_SOCKET_ASB2) += socket_ASB2
 subdirs-$(CONFIG_CPU_AMD_SOCKET_C32) += socket_C32
-subdirs-$(CONFIG_CPU_AMD_GX1) += model_gx1
-subdirs-$(CONFIG_CPU_AMD_GX2) += model_gx2
-subdirs-$(CONFIG_CPU_AMD_LX) += model_lx
+subdirs-$(CONFIG_CPU_AMD_GEODE_GX1) += geode_gx1
+subdirs-$(CONFIG_CPU_AMD_GEODE_GX2) += geode_gx2
+subdirs-$(CONFIG_CPU_AMD_GEODE_LX) += geode_lx
 subdirs-$(CONFIG_CPU_AMD_SC520) += sc520
 subdirs-$(CONFIG_CPU_AMD_SOCKET_S1G1) += socket_S1G1