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/mainboard/iei/pcisa-lx-800-r10/romstage.c b/src/mainboard/iei/pcisa-lx-800-r10/romstage.c
index 4121e3e..aec9843 100644
--- a/src/mainboard/iei/pcisa-lx-800-r10/romstage.c
+++ b/src/mainboard/iei/pcisa-lx-800-r10/romstage.c
@@ -53,9 +53,9 @@
 #include "northbridge/amd/lx/pll_reset.c"
 #include "northbridge/amd/lx/raminit.c"
 #include "lib/generic_sdram.c"
-#include "cpu/amd/model_lx/cpureginit.c"
-#include "cpu/amd/model_lx/syspreinit.c"
-#include "cpu/amd/model_lx/msrinit.c"
+#include "cpu/amd/geode_lx/cpureginit.c"
+#include "cpu/amd/geode_lx/syspreinit.c"
+#include "cpu/amd/geode_lx/msrinit.c"
 
 void main(unsigned long bist)
 {