arm: mx6: introduce disable_sata_clock

Implement disable_sata_clock for mx6 SoCs.

Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 80b11aa..ab7ac3d 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -596,6 +596,14 @@
 	ungate_sata_clock();
 	return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA);
 }
+
+void disable_sata_clock(void)
+{
+	struct mxc_ccm_reg *const imx_ccm =
+		(struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	clrbits_le32(&imx_ccm->CCGR5, MXC_CCM_CCGR5_SATA_MASK);
+}
 #endif
 
 int enable_pcie_clock(void)