[ARM] Convert AMBA PL010 driver to use the clk infrastructure

Convert the AMBA PL010 serial driver to use the clock infrastructure
to allow EP93xx platforms to properly gate the clock to the UARTs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ep93xx/clock.c

@@ -27,6 +27,10 @@ struct clk {
 	u32		enable_mask;
 };
 
+static struct clk clk_uart = {
+	.name		= "UARTCLK",
+	.rate		= 14745600,
+};
 static struct clk clk_pll1 = {
 	.name		= "pll1",
 };
@@ -50,6 +54,7 @@ static struct clk clk_usb_host = {
 
 
 static struct clk *clocks[] = {
+	&clk_uart,
 	&clk_pll1,
 	&clk_f,
 	&clk_h,