debugobjects: extend to assert that an object is initialized

debugobjects: extend to assert that an object is initialized

Calling del_timer_sync() on an uninitialized timer leads to a never ending
loop in lock_timer_base() that spins checking for a non-NULL timer base.
Add an assertion to debugobjects to catch usage of uninitialized objects
so that we can initialize timers in the del_timer_sync() path before it
calls lock_timer_base().

[sboyd@codeaurora.org: clarify commit message]
Signed-off-by: Christine Chan <cschan@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>