UPSTREAM: random: fix typo in add_timer_randomness()

s/entimate/estimate

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Link: https://lore.kernel.org/r/20190607182517.28266-4-tiny.windzz@gmail.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
(cherry picked from commit 727d499a6f4f29b6abdb635032f5e53e5905aedb)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 148665638
Change-Id: I27aef996d8d4f8b0d99a5476e512f63e327c5c2b