sh: sh2: Change CONFIG_SYS_HZ to CONFIG_SH_CMT_CLK_FREQ

CONFIG_SYS_HZ of SH2 is not used as frequency of base timer. This is the
correct clock of CMT.
This changes from CONFIG_SYS_HZ to CONFIG_SH_CMT_CLK_FREQ, in order to use
CONFIG_SYS_HZ as clock of CMT.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
diff --git a/include/configs/rsk7264.h b/include/configs/rsk7264.h
index 5338cf2..4aaa3ef 100644
--- a/include/configs/rsk7264.h
+++ b/include/configs/rsk7264.h
@@ -65,7 +65,7 @@
 #define CONFIG_SH_TMU_CLK_FREQ CONFIG_SYS_CLK_FREQ
 #define CONFIG_SH_SCIF_CLK_FREQ CONFIG_SYS_CLK_FREQ
 #define CMT_CLK_DIVIDER		32	/* 8 (default), 32, 128 or 512 */
-#define CONFIG_SYS_HZ		(CONFIG_SYS_CLK_FREQ / CMT_CLK_DIVIDER)
+#define CONFIG_SH_CMT_CLK_FREQ (CONFIG_SYS_CLK_FREQ / CMT_CLK_DIVIDER)
 
 /* Network interface */
 #define CONFIG_SMC911X