Adds a kernel boot parameter "lpj=NNN" which allows the operator to specify
the loops-per-jiffy value.  This shaves up to a quarter of a second off
boot times, which are critical for embedded appliances.

It's a bit thin, but the code is in __init.
Signed-off-by: Adam Kropelin <akropel1@rochester.rr.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>