Revert "Update kernel 3.4.2 to 3.4.20"

This reverts commit e75fc20eb9dc708749de18665635428adbb0fa96.
Revert "Update kernel to 3.4.2"

This reverts commit d6db650a7cd1b5e5741772debfc671007acc35eb.
Revert " Update kernel v3.4 to v3.4.1"

This reverts commit 42a4e6505a2bab7f5aaaad1d33dc9c45e5e08b7c.