usb: ehci-mx5: Use 'bool' instead of 'unsigned char'

The 'enable' argument can be better expressed as boolean.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Otavio Salvador <otavio@ossystems.com.br>
diff --git a/drivers/usb/host/ehci-mx5.c b/drivers/usb/host/ehci-mx5.c
index a397d24..dd11f53 100644
--- a/drivers/usb/host/ehci-mx5.c
+++ b/drivers/usb/host/ehci-mx5.c
@@ -223,10 +223,10 @@
 	struct usb_ehci *ehci;
 
 	set_usboh3_clk();
-	enable_usboh3_clk(1);
+	enable_usboh3_clk(true);
 	set_usb_phy_clk();
-	enable_usb_phy1_clk(1);
-	enable_usb_phy2_clk(1);
+	enable_usb_phy1_clk(true);
+	enable_usb_phy2_clk(true);
 	mdelay(1);
 
 	/* Do board specific initialization */