[source] kernel: Enable fadvise on older kernels.

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/146326c454c64c59e9243b1b51913edc0dcf98f5

commit 146326c454c64c59e9243b1b51913edc0dcf98f5
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Sat Nov 11 16:49:53 2017 -0800

    kernel: Enable fadvise on older kernels.
    
    Backport of 56342ee2bcbf9bf8918a01045471c7bb7faa1596 for older kernels.
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 target/linux/generic/config-3.18 | 2 +-
 target/linux/generic/config-4.4  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/linux/generic/config-3.18 b/target/linux/generic/config-3.18
index 1e3f0b5..4909fa0 100644
--- a/target/linux/generic/config-3.18
+++ b/target/linux/generic/config-3.18
@@ -90,7 +90,7 @@ CONFIG_32BIT=y
 # CONFIG_ADM6996_PHY is not set
 # CONFIG_ADM8211 is not set
 # CONFIG_ADT7316 is not set
-# CONFIG_ADVISE_SYSCALLS is not set
+CONFIG_ADVISE_SYSCALLS=y
 # CONFIG_ADXRS450 is not set
 CONFIG_AEABI=y
 # CONFIG_AFFS_FS is not set
diff --git a/target/linux/generic/config-4.4 b/target/linux/generic/config-4.4
index 1c0af95..23ed22d 100644
--- a/target/linux/generic/config-4.4
+++ b/target/linux/generic/config-4.4
@@ -82,7 +82,7 @@ CONFIG_32BIT=y
 # CONFIG_ADM6996_PHY is not set
 # CONFIG_ADM8211 is not set
 # CONFIG_ADT7316 is not set
-# CONFIG_ADVISE_SYSCALLS is not set
+CONFIG_ADVISE_SYSCALLS=y
 # CONFIG_ADXRS450 is not set
 CONFIG_AEABI=y
 # CONFIG_AFFS_FS is not set