oxnas: set irq of usb&sata to cpu1

V2:
The KD-20 also has USB 3.0.I modiy the set_irq_affinity usb 2 to set_irq_affinity ?hci_hcd 2 to bind usb 2.0&3.0 to cpu1.

Signed-off-by: Shonn Lu <countrysideboy@qq.com>

SVN-Revision: 47618

target/linux/oxnas/base-files/init.d/set-irq-affinity

+#!/bin/sh /etc/rc.common
+
+START=99
+
+get_irq() {
+	local name="$1"
+	grep -m 1 "$name" /proc/interrupts | cut -d: -f1 | sed 's, *,,'
+}
+
+set_irq_affinity() {
+	local name="$1"
+	local val="$2"
+	local irq="$(get_irq "$name")"
+	[ -n "$irq" ] || return
+	echo "$val" > "/proc/irq/$irq/smp_affinity"
+}
+
+start() {
+	set_irq_affinity ehci_hcd 2
+	set_irq_affinity xhci_hcd 2
+	set_irq_affinity sata 2
+}