this patch drops CONFIG_COMMON_CLK_DEBUG option
as this config option is now obsolete.

CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Olof Johansson <olof@lixom.net>
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>