pandaboard_defconfig: bump linux to 4.19.62 to fix build with gcc 8

The recent change to default to gcc 8 for the internal toolchain broke this
defconfig.  Fix it by bumping to the latest 4.19 kernel.

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/259853955

The kernel now uses ttySx for the omap serial ports, so adjust the getty
port to match.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/pandaboard_defconfig

@@ -2,14 +2,14 @@ BR2_arm=y
 BR2_cortex_a9=y
 BR2_ARM_ENABLE_NEON=y
 BR2_ARM_ENABLE_VFP=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_5=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
 BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
-BR2_TARGET_GENERIC_GETTY_PORT="ttyO2"
+BR2_TARGET_GENERIC_GETTY_PORT="ttyS2"
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/pandaboard/post-image.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.5"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.62"
 BR2_LINUX_KERNEL_DEFCONFIG="omap2plus"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="omap4-panda-es omap4-panda omap4-panda-a4"