imx: mx6qp Enable PRG clock for IPU

The i.MX6DQP has a PRG module, need to enable its clock for using IPU.
Signed-off-by: NPeng Fan <Peng.Fan@freescale.com>
Signed-off-by: NBrown Oliver <B37094@freescale.com>
Signed-off-by: NYe.Li <B37916@freescale.com>
Reviewed-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NStefano Babic <sbabic@denx.de>

arch/arm/cpu/armv7/mx6/clock.c

@@ -853,6 +853,11 @@ void enable_ipu_clock(void)
 	reg = readl(&mxc_ccm->CCGR3);
 	reg |= MXC_CCM_CCGR3_IPU1_IPU_MASK;
 	writel(reg, &mxc_ccm->CCGR3);
+
+	if (is_mx6dqp()) {
+		setbits_le32(&mxc_ccm->CCGR6, MXC_CCM_CCGR6_PRG_CLK0_MASK);
+		setbits_le32(&mxc_ccm->CCGR3, MXC_CCM_CCGR3_IPU2_IPU_MASK);
+	}
 }
 #endif
 /***************************************************/