[source] bcm53xx: switch to kernel 4.9

[LEDE Commits]

rmilecki pushed a commit to source.git, branch master:
https://git.lede-project.org/0694d08c84fd528e02c91c01a9c1c32639d85cc7

commit 0694d08c84fd528e02c91c01a9c1c32639d85cc7
Author: Rafał Miłecki <rafal at milecki.pl>
AuthorDate: Sat Mar 18 23:00:00 2017 +0100

    bcm53xx: switch to kernel 4.9
    
    With iproc regression fixed and GIC interrupts in DTS updated it seems
    we can safely start using 4.9.
    
    Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
---
 target/linux/bcm53xx/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/bcm53xx/Makefile b/target/linux/bcm53xx/Makefile
index a98fd39..bd966e2 100644
--- a/target/linux/bcm53xx/Makefile
+++ b/target/linux/bcm53xx/Makefile
@@ -13,7 +13,7 @@ FEATURES:=squashfs nand usb pci pcie gpio
 MAINTAINER:=Hauke Mehrtens <hauke at hauke-m.de>
 CPU_TYPE:=cortex-a9
 
-KERNEL_PATCHVER:=4.4
+KERNEL_PATCHVER:=4.9
 
 define Target/Description
 	Build firmware images for Broadcom based BCM47xx/53xx routers with ARM CPU, *not* MIPS.