Squashed update of kernel from 3.0.86 to 3.0.87
Revert "ARM: 7765/1: perf: Record the user-mode PC in the call chain."

 * Causes battery charging to sometimes fail.

This reverts commit cd8bca6fe4862f5af7244a5f5e4b08788ccaff11.
Squashed update of kernel from 3.0.87 to 3.0.88