initramfs-framework: add lvm module

lvm module will initial lvm volume to support boot from
Logical Volume.

(From OE-Core rev: 3a4213f014fc4aa5be05dfc0722d87e01e5ff10c)

Signed-off-by: Liwei Song <liwei.song@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/initrdscripts/initramfs-framework/lvm

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+lvm_enabled() {
+	if ! lvscan |grep -i -w "inactive" &>/dev/null;then
+		return 1
+	fi
+	return 0
+}
+
+lvm_run() {
+	lvm pvscan --cache --activate ay
+	udevadm trigger --action=add
+}