mx28: Show CPU frequency

Showing CPU frequency during boot is useful information.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>

arch/arm/cpu/arm926ejs/mx28/mx28.c

@@ -169,7 +169,8 @@ int arch_cpu_init(void)
 #if defined(CONFIG_DISPLAY_CPUINFO)
 int print_cpuinfo(void)
 {
-	printf("Freescale i.MX28 family\n");
+	printf("Freescale i.MX28 family at %d MHz\n",
+			mxc_get_clock(MXC_ARM_CLK) / 1000000);
 	return 0;
 }
 #endif