bcm47xx: switch to kernel 4.19

Ethernet, switch, LEDs, buttons, USB, sysupgrade & LuCI were
successfully tested on BCM4706.

Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/bcm47xx/Makefile

@@ -13,7 +13,7 @@ FEATURES:=squashfs usb
 SUBTARGETS:=generic mips74k legacy
 MAINTAINER:=Hauke Mehrtens <[email protected]>
 
-KERNEL_PATCHVER:=4.14
+KERNEL_PATCHVER:=4.19
 KERNEL_TESTING_PATCHVER := 4.19
 
 define Target/Description