time.o gets rebuilt unconditionally due to a leftover Makefile rule
which was placed there for development purposes.

Remove it along with the commented out always rule in the toplevel
Kbuild file.

Fixes: 0a227985 'time: Move timeconst.h into include/generated'
Reported-by; Stephen Boyd <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Nicholas Mc Guire <[email protected]>