qemu: update to 9.1.0

- Update version
- Refresh patches
- Remove unsupported config options:
  - `--enable-live-block-migration`
  - `--disable-pvrdma`

Signed-off-by: Vladimir Ermakov <vooon341@gmail.com>

utils/qemu/patches/0001-configure-allow-disable-fortify_source.patch

@@ -11,7 +11,7 @@ OpenWrt base build system decide flavor of fortify_source to use
 
 --- a/configure
 +++ b/configure
-@@ -760,6 +760,8 @@ for opt do
+@@ -757,6 +757,8 @@ for opt do
    ;;
    --gdb=*) gdb_bin="$optarg"
    ;;