dracut-gencmdline: fix regex quoting in findstoragedriver()

On my LVM system this changes the relevant output from "rd_NO_LVM" to
"rd_LVM_VG=alan-desktop.Linux"

Note that on my newer system, it now reaches moduledep() and complains.
I don't know enough awk to tell whose fault it is :).

    awk: line 2: function gensub never defined
    awk: line 2: function gensub never defined
    rd_NO_MD rd_NO_LVM rd_NO_LUKS LANG=en_GB.UTF-8 root=/dev/sda2

Both my systems (old ubuntu and debian unstable) agree that bash
regexes should not be quoted:

    $ [[ 'a' =~ a ]] && echo match
    match
    $ [[ 'a' =~ ^a$ ]] && echo match
    match
    $ [[ 'a' =~ '^a$' ]] && echo match
    $

(and yes, it is safe against globbing)

    $ touch 9
    $ echo [0-9]
    9
    $ [[ 1 =~ [0-9] ]] && echo match
    match

dracut-gencmdline

@@ -212,7 +212,7 @@ findstoragedriverinsys () {
         sysfs=$(freadlink ${sysfs%/*})
     fi
 
-    if [[ ! "$sysfs" =~ '^/sys/.*block/.*$' ]]; then
+    if [[ ! "$sysfs" =~ ^/sys/.*block/.*$ ]]; then
         #error "WARNING: $sysfs is a not a block sysfs path, skipping"
         return
     fi
@@ -223,12 +223,12 @@ findstoragedriverinsys () {
         *) handleddevices="$handleddevices $sysfs" ;;
     esac
 
-    if [[ "$sysfs" =~ '^/sys/.*block/md[0-9]+$' ]]; then
+    if [[ "$sysfs" =~ ^/sys/.*block/md[0-9]+$ ]]; then
         local raid=${sysfs##*/}
         vecho "Found MDRAID component $raid"
         handleraid $raid
     fi
-    if [[ "$sysfs" =~ '^/sys/.*block/dm-[0-9]+$' ]]; then
+    if [[ "$sysfs" =~ ^/sys/.*block/dm-[0-9]+$ ]]; then
         vecho "Found DeviceMapper component ${sysfs##*/}"
         handledm $(cat $sysfs/dev |cut -d : -f 1) $(cat $sysfs/dev |cut -d : -f 2)
     fi