Fix spelling

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Haakan T Johansson <f96hajo@chalmers.se>
Closes #5547 
Closes #5543

module/icp/include/sha1/sha1.h

@@ -35,7 +35,7 @@ extern "C" {
 /*
  * NOTE: n2rng (Niagara2 RNG driver) accesses the state field of
  * SHA1_CTX directly.  NEVER change this structure without verifying
- * compatiblity with n2rng.  The important thing is that the state
+ * compatibility with n2rng.  The important thing is that the state
  * must be in a field declared as uint32_t state[5].
  */
 /* SHA-1 context. */