hpet: fix style issue about braces and alignment

This patch fix all style issue for braces and alignment

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Link: https://lore.kernel.org/r/20220125140311.4084998-1-clabbe@baylibre.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>