std: sys: fs: uefi: Implement remove_dir_all

- Using the implementation from sys::fs::common since UEFI does not have
  a built-in for this functionality.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>

library/std/src/sys/fs/uefi.rs

@@ -6,7 +6,7 @@
 use crate::hash::Hash;
 use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut, SeekFrom};
 use crate::path::{Path, PathBuf};
-pub use crate::sys::fs::common::Dir;
+pub use crate::sys::fs::common::{Dir, remove_dir_all};
 use crate::sys::pal::{helpers, unsupported};
 use crate::sys::time::SystemTime;
 
@@ -446,10 +446,6 @@ pub fn rmdir(p: &Path) -> io::Result<()> {
     }
 }
 
-pub fn remove_dir_all(_path: &Path) -> io::Result<()> {
-    unsupported()
-}
-
 pub fn exists(path: &Path) -> io::Result<bool> {
     let f = uefi_fs::File::from_path(path, r_efi::protocols::file::MODE_READ, 0);
     match f {