x86: fix build of geode target

The build bot complained that the OLPC option was not set.

Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/x86/geode/config-default

@@ -89,6 +89,7 @@ CONFIG_MGEODEGX1=y
 CONFIG_NATSEMI=y
 CONFIG_NET5501=y
 CONFIG_NSC_GPIO=y
+# CONFIG_OLPC is not set
 CONFIG_PATA_CS5520=y
 CONFIG_PATA_CS5530=y
 CONFIG_PATA_CS5535=y