I wanted to install kodi on my box but unable to do so due to not having enough space on the device. From reading other posts, I should have at least a gig for the / partition, but on mine I only have 524M. I don't really need multiboot, so is there a way to increase the partition size and decrease the multi-boot slots?

Code:
root@zgemmah7:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/mmcblk0p3          523.9M    448.5M     35.1M  93% /
devtmpfs                185.8M      4.0K    185.8M   0% /dev
tmpfs                    64.0K         0     64.0K   0% /media
/dev/mmcblk0p1            3.0M     10.0K      3.0M   0% /boot
tmpfs                   502.0M    980.0K    501.0M   0% /var/volatile
/dev/sda1               464.7G    342.6G    122.1G  74% /media/hdd