ARM: mxc: audmux-v2: add clk_prepare/clk_unprepare

It's for migrating to generic clk framework API.
Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/audmux-v2.c

@@ -73,13 +73,13 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
 		return -ENOMEM;
 
 	if (audmux_clk)
-		clk_enable(audmux_clk);
+		clk_prepare_enable(audmux_clk);
 
 	ptcr = readl(audmux_base + MXC_AUDMUX_V2_PTCR(port));
 	pdcr = readl(audmux_base + MXC_AUDMUX_V2_PDCR(port));
 
 	if (audmux_clk)
-		clk_disable(audmux_clk);
+		clk_disable_unprepare(audmux_clk);
 
 	ret = snprintf(buf, PAGE_SIZE, "PDCR: %08x\nPTCR: %08x\n",
 		       pdcr, ptcr);
@@ -172,13 +172,13 @@ int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
 		return -ENOSYS;
 
 	if (audmux_clk)
-		clk_enable(audmux_clk);
+		clk_prepare_enable(audmux_clk);
 
 	writel(ptcr, audmux_base + MXC_AUDMUX_V2_PTCR(port));
 	writel(pdcr, audmux_base + MXC_AUDMUX_V2_PDCR(port));
 
 	if (audmux_clk)
-		clk_disable(audmux_clk);
+		clk_disable_unprepare(audmux_clk);
 
 	return 0;
 }