ARM: move body of head-common.S back to text section

Commit 281ecb7 "arm: delete __cpuinit/__CPUINIT usage from all ARM
users" removed a __CPUINIT from head-common.S. However, the code
immediately before the removed tag was marked __INIT, and was missing
a match __FINIT. This caused code after the removed __CPUINIT to end
up in the init section rather than the main text section as desired.
This caused issues such as secondary CPU boot failures or crashes.
Add the missing __FINIT to solve this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Revert "clocksource: Add generic dummy timer driver"

This reverts commit 064706514ec3fea740c2656e03c4f01f6a551ac4.