dracut-module-setup.sh: kdump module depends on drm module

When 1st kernel is using KMS and crash, 2nd kernel can't reset to
nomodeset and the screen is black. In this case, user can't observe the
boot/dump progress and run commands in shell.

So let's pull in drm dracut module to fix this.

Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>

dracut-module-setup.sh

@@ -18,6 +18,11 @@ depends() {
     if sestatus 2>/dev/null | grep -q "SELinux status.*enabled"; then
         _dep="$_dep selinux"
     fi
+
+    if [ -d /sys/module/drm/drivers ]; then
+        _dep="$_dep drm"
+    fi
+
     echo $_dep
     return 0
 }