ARM: mmp: add usb clock for pxa168/pxa910

Signed-off-by: NChao Xie <chao.xie@marvell.com>
Signed-off-by: NEric Miao <eric.y.miao@gmail.com>

arch/arm/mach-mmp/pxa910.c

@@ -111,6 +111,7 @@ static APBC_CLK(pwm3, PXA910_PWM3, 1, 13000000);
 static APBC_CLK(pwm4, PXA910_PWM4, 1, 13000000);
 
 static APMU_CLK(nand, NAND, 0x01db, 208000000);
+static APMU_CLK(u2o, USB, 0x1b, 480000000);
 
 /* device and clock bindings */
 static struct clk_lookup pxa910_clkregs[] = {
@@ -123,6 +124,7 @@ static struct clk_lookup pxa910_clkregs[] = {
 	INIT_CLKREG(&clk_pwm3, "pxa910-pwm.2", NULL),
 	INIT_CLKREG(&clk_pwm4, "pxa910-pwm.3", NULL),
 	INIT_CLKREG(&clk_nand, "pxa3xx-nand", NULL),
+	INIT_CLKREG(&clk_u2o, "pxa-u2o", "U2OCLK"),
 };
 
 static int __init pxa910_init(void)