zynq: switch to kernel 4.19

Use kernel 4.19 by default

Signed-off-by: Luis Araneda <[email protected]>

target/linux/zynq/Makefile

@@ -20,7 +20,7 @@ define Target/Description
 	Build firmware image for Zynq 7000 SoC devices.
 endef
 
-KERNEL_PATCHVER:=4.14
+KERNEL_PATCHVER:=4.19
 
 include $(INCLUDE_DIR)/target.mk