uboot-imx

sh: timer: Change definition of clock of TMU

The former SH/TMU driver had calculated timer based on CONFIG_SYS_CLK_FREQ.
The newest SH/TMU newly needs calculation of the clock for TMU.
This patch defines clock CONFIG_SH_TMU_CLK_FREQ for TMU and changes it to
CONFIG_SH_TMU_CLK_FREQ from CONFIG_SYS_CLK_FREQ.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>