time: Workaround gcc loop optimization that causes 64bit div errors

time: Workaround gcc loop optimization that causes 64bit div errors

Early 4.3 versions of gcc apparently aggressively optimize the raw
time accumulation loop, replacing it with a divide.

On 32bit systems, this causes the following link errors:
	undefined reference to `__umoddi3'
	undefined reference to `__udivdi3'

The gcc issue has been fixed in 4.4 and greater.

This patch replaces the accumulation loop with a do_div, as suggested
by Linus.

Signed-off-by: John Stultz <[email protected]>
CC: Jason Wessel <[email protected]>
CC: Larry Finger <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: Linus Torvalds <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>