nitrogen6x: Setup CCM_CCOSR register

CKO1 drives sgtl5000 codec clock on nitrogen boards and wandboard.

Doing this setup in the bootloader will allow us to remove a lot of code in
arch/arm/mach-imx/mach-imx6q.c from the mainline kernel.

Also, according to Eric Nelson: "enabling the clock <in the bootloader> will
remove squeal after an ungraceful reboot (watchdog) if hooked up to speakers."

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

arch/arm/include/asm/arch-mx6/crm_regs.h

@@ -20,6 +20,7 @@
 #ifndef __ARCH_ARM_MACH_MX6_CCM_REGS_H__
 #define __ARCH_ARM_MACH_MX6_CCM_REGS_H__
 
+#define CCM_CCOSR		0x020c4060
 #define CCM_CCGR0		0x020C4068
 #define CCM_CCGR1		0x020C406c
 #define CCM_CCGR2		0x020C4070

board/boundary/nitrogen6x/clocks.cfg

@@ -44,3 +44,14 @@ DATA 4, MX6_IOMUXC_GPR4, 0xF00000CF
 /* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
 DATA 4, MX6_IOMUXC_GPR6, 0x007F007F
 DATA 4, MX6_IOMUXC_GPR7, 0x007F007F
+
+/*
+ * Setup CCM_CCOSR register as follows:
+ *
+ * cko1_en  = 1	   --> CKO1 enabled
+ * cko1_div = 111  --> divide by 8
+ * cko1_sel = 1011 --> ahb_clk_root
+ *
+ * This sets CKO1 at ahb_clk_root/8 = 132/8 = 16.5 MHz
+ */
+DATA 4, CCM_CCOSR, 0x000000fb