Please append a correct "root=" boot option; here are the available partitions:
1f00 1024 mtdblock0 (driver?)
1f01 3840 mtdblock1 (driver?)
1f02 3072 mtdblock2 (driver?)
1f03 61440 mtdblock3 (driver?)
1f04 61440 mtdblock4 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,3)