apparmor: fix typo "type"

Signed-off-by: Zygmunt Krynicki <[e-mail]>
Acked-by: Christian Boltz <[e-mail]>
Signed-off-by: John Johansen <[e-mail]>

security/apparmor/lib.c

···
  * @request: requested perms
  * @deny: Returns: explicit deny set
  * @sa: initialized audit structure (MAY BE NULL if not auditing)
- * @cb: callback fn for tpye specific fields (MAY BE NULL)
+ * @cb: callback fn for type specific fields (MAY BE NULL)
  *
  * Returns: 0 if permission else error code
  *