dev/mmcblk0p1 should be something like ID c W95 FAT32 (LBA) I'm not sure but I guess changing the id back with fdisk would destroy all your data on MyDocs.
sudo gainroot echo "unit: sectors > /dev/mmcblk0p1 : start= 64, size=51199936 , Id=c > /dev/mmcblk0p2 : start= 56631360, size= 4194304, Id=83 > /dev/mmcblk0p3 : start= 60825664, size= 1572864, Id=82 > /dev/mmcblk0p4 : start= 51200000, size= 5431360, Id= 5" > table
sfdisk --no-reread /dev/mmcblk0 < table