Due to a typo, /boot is not properly unmounted after copying the backup
file to it. Fix the typo to solve this.
Fixes: 246916ddf4 ("brcm2708: use x86's upgrade scripts for all rpi targets")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
If you want to use the Raspberry Pi UART, "console=serial0,115200" needs
to be removed from the kernel cmdline. This is done by editing
/boot/cmdline.txt. However, this file is not currently backed up during
sysupgrade, so this effectively breaks HATs that require the use of the
UART every sysupgrade.
Backup this file during sysupgrade, and restore it before rebooting.
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
