[source] brcm47xx: use kernel 4.9 by default

[LEDE Commits]

hauke pushed a commit to source.git, branch master:
https://git.lede-project.org/2af10c30fe5a7f1d13a790187868c1ee2209a575

commit 2af10c30fe5a7f1d13a790187868c1ee2209a575
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Wed Oct 18 21:53:31 2017 +0200

    brcm47xx: use kernel 4.9 by default
    
    Kernel 4.9 is now working on the brcm47xx boards, we just recently fixed
    the problem that some boards did not boot at all, by changing the memory
    regions used to relocate the kernel to in the loader.
    
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/brcm47xx/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/brcm47xx/Makefile b/target/linux/brcm47xx/Makefile
index 73b7bff..f0ac7f9 100644
--- a/target/linux/brcm47xx/Makefile
+++ b/target/linux/brcm47xx/Makefile
@@ -13,7 +13,7 @@ FEATURES:=squashfs usb
 SUBTARGETS:=generic mips74k legacy
 MAINTAINER:=Hauke Mehrtens <hauke at hauke-m.de>
 
-KERNEL_PATCHVER:=4.4
+KERNEL_PATCHVER:=4.9
 
 define Target/Description
 	Build firmware images for Broadcom based BCM47xx/53xx routers with MIPS CPU, *not* ARM.