cp: fix Ioctl casting for ppc64 (Closes: #8161)

Author: Maksim Panfilov

src/uu/cp/src/platform/linux.rs

@@ -62,12 +62,10 @@ where
     let dst_file = File::create(&dest)?;
     let src_fd = src_file.as_raw_fd();
     let dst_fd = dst_file.as_raw_fd();
-    // Using .try_into().unwrap() is required as glibc, musl & android all have different type for ioctl()
-    #[allow(clippy::unnecessary_fallible_conversions)]
     let result = unsafe {
         libc::ioctl(
             dst_fd,
-            linux_raw_sys::ioctl::FICLONE.try_into().unwrap(),
+            linux_raw_sys::ioctl::FICLONE as libc::Ioctl,
             src_fd,
         )
     };