MIMC200: tidy GCLK init code

Change the MIMC200 startup code to use the built-in (rather than
hard-coded) funtions for setting up gclk outputs.

We'll also move the code to the new, more-appropriate
board_postclk_init() routine.

Signed-off-by: Mark Jackson <mpfj@mimc.co.uk>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

board/mimc/mimc200/mimc200.c

@@ -30,8 +30,6 @@
 #include <asm/arch/portmux.h>
 #include <lcd.h>
 
-#define SM_PM_GCCTRL				0x0060
-
 DECLARE_GLOBAL_DATA_PTR;
 
 static const struct sdram_config sdram_config = {
@@ -83,10 +81,6 @@ int board_early_init_f(void)
 	portmux_select_gpio(PORTMUX_PORT_C, 1 << 18,
 			PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH);
 
-	/* GCLK0 - 10MHz clock */
-	writel(0x00000004, (void *)SM_BASE + SM_PM_GCCTRL);
-	portmux_select_peripheral(PORTMUX_PORT_A, 1 << 30, PORTMUX_FUNC_A, 0);
-
 	udelay(5000);
 
 	/* release phys reset */
@@ -132,6 +126,14 @@ int board_early_init_r(void)
 	return 0;
 }
 
+int board_postclk_init(void)
+{
+	/* Use GCLK0 as 10MHz output */
+	gclk_enable_output(0, PORTMUX_DRIVE_LOW);
+	gclk_set_rate(0, GCLK_PARENT_OSC0, 10000000);
+	return 0;
+}
+
 /* SPI chip select control */
 #ifdef CONFIG_ATMEL_SPI
 #include <spi.h>