Revert "arch/arm/mach-msm/Kconfig: decouple QCACHE from MSM board"

This reverts commit 3a386b386425f652213c06bab542ff235ee3b238.
Revert "ARM: fix "bad mode in ... handler" message for undefined instructions"

This reverts commit 2f7c168ca65e40371f0d7f9acae4ce1cc9fca101.
Revert "timer: optimize apply_slack()"

This reverts commit 83e398f531ab6e8f44a908e0e129973660ed1011.