arm: rmobile: kzm9g: Adjust ETM trace clock

Set ETM TRCLK down to 78MHz to get clear wave form.
This patch makes difference only when you use ETM trace connecting JTAG debugger.

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Acked-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

board/kmc/kzm9g/kzm9g.c

@@ -195,7 +195,7 @@ void s_init(void)
 
 	/* FRQCR Init */
 	writel(0x0012453C, &cpg->frqcra);
-	writel(0x80331350, &cpg->frqcrb);
+	writel(0x80431350, &cpg->frqcrb);    /* ETM TRCLK  78MHz */
 	cmp_loop(&cpg->frqcrb, 0x80000000, 0x0);
 	writel(0x00000B0B, &cpg->frqcrd);
 	cmp_loop(&cpg->frqcrd, 0x80000000, 0x0);