random: fix typo in comments

stable inclusion
from stable-v5.10.119
commit 8a3b78f9177c7d0f061e05b317f812507f3046a2
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6BB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8a3b78f9177c7d0f061e05b317f812507f3046a2

--------------------------------

commit c0a8a61e upstream.

s/or/for
Signed-off-by: Schspa Shi <schspa@gmail.com>
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/char/random.c

@@ -101,7 +101,7 @@
  * ===============================
  *
  * There are four exported interfaces; two for use within the kernel,
- * and two or use from userspace.
+ * and two for use from userspace.
  *
  * Exported interfaces ---- userspace output
  * -----------------------------------------