clk/ast2600: Adjust eMMC clock names

Adjust clock to stay compatible with those used by the Linux kernel
device tree.

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/drivers/clk/aspeed/clk_ast2600.c b/drivers/clk/aspeed/clk_ast2600.c
index 7d85c7f..0df1dc3 100644
--- a/drivers/clk/aspeed/clk_ast2600.c
+++ b/drivers/clk/aspeed/clk_ast2600.c
@@ -1073,13 +1073,13 @@
 	case ASPEED_CLK_GATE_SDCLK:
 		ast2600_enable_sdclk(priv->scu);
 		break;
-	case ASPEED_CLK_GATE_SDEXTCLK:
+	case ASPEED_CLK_SDIO:
 		ast2600_enable_extsdclk(priv->scu);
 		break;
 	case ASPEED_CLK_GATE_EMMCCLK:
 		ast2600_enable_emmcclk(priv->scu);
 		break;
-	case ASPEED_CLK_GATE_EMMCEXTCLK:
+	case ASPEED_CLK_EMMC:
 		ast2600_enable_extemmcclk(priv->scu);
 		break;
 	case ASPEED_CLK_GATE_FSICLK: