configs/rock64_defconfig: bump linux kernel to 4.19.216

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/1758966299

To correct a build breakage after the move to a gcc 10.x based host
compiler, as the updated kernel contains a fix for:

HOSTLD  scripts/dtc/dtc
/usr/bin/ld: scripts/dtc/dtc-parser.tab.o:(.bss+0x10): multiple definition of `yylloc'; scripts/dtc/dtc-lexer.lex.o:(.bss+0x0): first defined here

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e33a814e772cdc36436c8c188d8c42d019fda639

Build-tested only.

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

configs/rock64_defconfig

@@ -7,7 +7,7 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/pine64/rock64/genimage.cfg"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.19"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.216"
 BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="rockchip/rk3328-rock64"