[source] x86/legacy: add missing config symbol

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/bf58e39b9bd73a21a319a69ca5724a63c5a896a5

commit bf58e39b9bd73a21a319a69ca5724a63c5a896a5
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Fri May 5 10:19:31 2017 +0200

    x86/legacy: add missing config symbol
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 target/linux/x86/legacy/config-default | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/x86/legacy/config-default b/target/linux/x86/legacy/config-default
index 2bcdef7..0061ce2 100644
--- a/target/linux/x86/legacy/config-default
+++ b/target/linux/x86/legacy/config-default
@@ -149,6 +149,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_LCD_CLASS_DEVICE is not set
 CONFIG_LZO_COMPRESS=y
 CONFIG_LZO_DECOMPRESS=y
+CONFIG_M486=y
 # CONFIG_MDA_CONSOLE is not set
 CONFIG_MFD_CORE=y
 CONFIG_MFD_INTEL_LPSS=y