rephrase comment for readability

Reference: /n/atom/patch/applied/usbehcicmt
Date: Fri May  2 22:22:28 CES 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/port/usbehci.c	Fri May  2 22:22:28 2014
+++ /sys/src/nix/port/usbehci.c	Fri May  2 22:22:28 2014
@@ -1549,9 +1549,8 @@
 		wakeup(ctlr);
 	}
 	/*
-	 * We enter always this if, even if it seems the
-	 * interrupt does not report anything done/failed.
-	 * Some controllers don't post interrupts right.
+	 * Execute even if it seems the interrupt does not report anything.
+	 * Some controllers don't post interrupts correctly.
 	 */
 	some = 0;
 	if((sts & (Serrintr|Sintr)) != 0){