time: Fix references to _msecs_to_jiffies() handling of values

[ Upstream commit 92b043fd ]

The details about the handling of the "normal" values were moved
to the _msecs_to_jiffies() helpers in commit ca42aaf0 ("time:
Refactor msecs_to_jiffies"). However, the same commit still mentioned
__msecs_to_jiffies() in the added documentation.

Thus point to _msecs_to_jiffies() instead.

Fixes: ca42aaf0 ("time: Refactor msecs_to_jiffies")
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241025110141.157205-2-ojeda@kernel.org


Signed-off-by: Sasha Levin <sashal@kernel.org>