orangepi_zero_defconfig: bump linux to 4.19.3, u-boot to 2018.11

4.18 brought cpufreq support for H3, but sunxi_defconfig does not enable the
ondemand cpufreq govenor so the frequency is dynamically adjusted - So
enable it in linux-extra.config.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/orangepi/orangepi-zero/linux-extras.config

@@ -15,3 +15,6 @@ CONFIG_CFG80211_WEXT=y
 
 # wireless drivers
 CONFIG_WLAN=y
+
+# ondemand cpufreq governor
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y

configs/orangepi_zero_defconfig

@@ -3,13 +3,13 @@ BR2_cortex_a7=y
 BR2_ARM_FPU_VFPV4=y
 BR2_GLOBAL_PATCH_DIR="board/orangepi/orangepi-zero/patches"
 BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_17=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
 BR2_TARGET_GENERIC_HOSTNAME="OrangePi_Zero"
 BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the Orange Pi Zero"
 BR2_SYSTEM_DHCP="eth0"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.17.15"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.3"
 BR2_LINUX_KERNEL_DEFCONFIG="sunxi"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="sun8i-h2-plus-orangepi-zero"
@@ -21,7 +21,7 @@ BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2018.07"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2018.11"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="orangepi_zero"
 BR2_TARGET_UBOOT_NEEDS_DTC=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y