mmc: dw_mmc: change the callback function name.

To prevent the confusion, use the get_mmc_clk() instead of mmc_clk().
get_mmc_clk() is more exactly name.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
diff --git a/include/dwmmc.h b/include/dwmmc.h
index 08ced0b..ecaa763 100644
--- a/include/dwmmc.h
+++ b/include/dwmmc.h
@@ -138,7 +138,7 @@
 	struct mmc *mmc;
 
 	void (*clksel)(struct dwmci_host *host);
-	unsigned int (*mmc_clk)(int dev_index);
+	unsigned int (*get_mmc_clk)(int dev_index);
 };
 
 struct dwmci_idmac {