project-lakitu: switch lakitu board to Linux kernel 5.10

BUG=b/173821368
TEST=presubmit
RELEASE_NOTE=Upgrade COS to Linux kernel 5.10 LTS branch

Change-Id: I0eb85bcce739cfe5a259ba1bf9a368d24eda44fd
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/17012
Reviewed-by: Roy Yang <royyang@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/project-lakitu/profiles/base/make.defaults b/project-lakitu/profiles/base/make.defaults
index 5e4adf5..6b839df 100644
--- a/project-lakitu/profiles/base/make.defaults
+++ b/project-lakitu/profiles/base/make.defaults
@@ -13,7 +13,7 @@
 USE="${USE} pam"
 
 # Kernel specific use flags.
-USE="${USE} kernel_sources kernel-5_4"
+USE="${USE} kernel_sources kernel-5_10"
 
 # Disable some kernel options.
 USE="${USE} -fbconsole -firmware_install -mbim -vlan"
diff --git a/project-lakitu/virtual/linux-sources/linux-sources-1.5-r1.ebuild b/project-lakitu/virtual/linux-sources/linux-sources-1.5-r2.ebuild
similarity index 100%
rename from project-lakitu/virtual/linux-sources/linux-sources-1.5-r1.ebuild
rename to project-lakitu/virtual/linux-sources/linux-sources-1.5-r2.ebuild
diff --git a/project-lakitu/virtual/linux-sources/linux-sources-1.5.ebuild b/project-lakitu/virtual/linux-sources/linux-sources-1.5.ebuild
index ff835e2..a973ba3 100644
--- a/project-lakitu/virtual/linux-sources/linux-sources-1.5.ebuild
+++ b/project-lakitu/virtual/linux-sources/linux-sources-1.5.ebuild
@@ -37,8 +37,8 @@
 	$(for v in "${IUSE_KERNEL_VERS[@]}"; do echo "!${v}? ( !sys-kernel/lakitu-${v} )"; done)
 "
 
-# Default to the 5.4 kernel if none has been selected.
-RDEPEND_DEFAULT="sys-kernel/lakitu-kernel-5_4"
+# Default to the 5.10 kernel if none has been selected.
+RDEPEND_DEFAULT="sys-kernel/lakitu-kernel-5_10"
 
 # Here be dragons!
 RDEPEND+="