lakitu:kernel: Disable CONFIG_PPP

CONFIG_PPP enables peer-to-peer communication support. This is not
needed for COS. Disabling it to remove exposure to CVE-2020-14416.

BUG=b:159693194
TEST=tryjobs
RELEASE_NOTE=Disable CONFIG_PPP to mitigate Linux Kernel CVE-2020-14416.

Change-Id: I7701521222f6d7b77f16bb4da83a0f0d098604a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/board-overlays/+/2269344
Reviewed-by: Aditya Kali <adityakali@google.com>
Reviewed-by: Roy Yang <royyang@google.com>
Commit-Queue: Aditya Kali <adityakali@google.com>
Tested-by: Aditya Kali <adityakali@google.com>
diff --git a/overlay-lakitu/sys-kernel/lakitu-kernel-4_19/files/base.config b/overlay-lakitu/sys-kernel/lakitu-kernel-4_19/files/base.config
index 786b538..4557827 100644
--- a/overlay-lakitu/sys-kernel/lakitu-kernel-4_19/files/base.config
+++ b/overlay-lakitu/sys-kernel/lakitu-kernel-4_19/files/base.config
@@ -1976,17 +1976,7 @@
 # CONFIG_TERANETICS_PHY is not set
 # CONFIG_VITESSE_PHY is not set
 # CONFIG_XILINX_GMII2RGMII is not set
-CONFIG_PPP=m
-# CONFIG_PPP_BSDCOMP is not set
-# CONFIG_PPP_DEFLATE is not set
-# CONFIG_PPP_FILTER is not set
-# CONFIG_PPP_MPPE is not set
-# CONFIG_PPP_MULTILINK is not set
-# CONFIG_PPPOE is not set
-CONFIG_PPP_ASYNC=m
-# CONFIG_PPP_SYNC_TTY is not set
-# CONFIG_SLIP is not set
-CONFIG_SLHC=m
+# CONFIG_PPP is not set
 
 #
 # Host-side USB support is needed for USB Network Adapter support
diff --git a/overlay-lakitu/sys-kernel/lakitu-kernel-4_19/lakitu-kernel-4_19-4.19.127-r535.ebuild b/overlay-lakitu/sys-kernel/lakitu-kernel-4_19/lakitu-kernel-4_19-4.19.127-r536.ebuild
similarity index 100%
rename from overlay-lakitu/sys-kernel/lakitu-kernel-4_19/lakitu-kernel-4_19-4.19.127-r535.ebuild
rename to overlay-lakitu/sys-kernel/lakitu-kernel-4_19/lakitu-kernel-4_19-4.19.127-r536.ebuild
diff --git a/overlay-lakitu/sys-kernel/lakitu-kernel-5_4/files/base.config b/overlay-lakitu/sys-kernel/lakitu-kernel-5_4/files/base.config
index 833f139..4730e67 100644
--- a/overlay-lakitu/sys-kernel/lakitu-kernel-5_4/files/base.config
+++ b/overlay-lakitu/sys-kernel/lakitu-kernel-5_4/files/base.config
@@ -2064,17 +2064,7 @@
 # CONFIG_TERANETICS_PHY is not set
 # CONFIG_VITESSE_PHY is not set
 # CONFIG_XILINX_GMII2RGMII is not set
-CONFIG_PPP=m
-# CONFIG_PPP_BSDCOMP is not set
-# CONFIG_PPP_DEFLATE is not set
-# CONFIG_PPP_FILTER is not set
-# CONFIG_PPP_MPPE is not set
-# CONFIG_PPP_MULTILINK is not set
-# CONFIG_PPPOE is not set
-CONFIG_PPP_ASYNC=m
-# CONFIG_PPP_SYNC_TTY is not set
-# CONFIG_SLIP is not set
-CONFIG_SLHC=m
+# CONFIG_PPP is not set
 
 #
 # Host-side USB support is needed for USB Network Adapter support
diff --git a/overlay-lakitu/sys-kernel/lakitu-kernel-5_4/lakitu-kernel-5_4-5.4.49-r15.ebuild b/overlay-lakitu/sys-kernel/lakitu-kernel-5_4/lakitu-kernel-5_4-5.4.49-r16.ebuild
similarity index 100%
rename from overlay-lakitu/sys-kernel/lakitu-kernel-5_4/lakitu-kernel-5_4-5.4.49-r15.ebuild
rename to overlay-lakitu/sys-kernel/lakitu-kernel-5_4/lakitu-kernel-5_4-5.4.49-r16.ebuild