crypto: cavium - fix typos in comments

Replace 'is' with 'it'

file: drivers/crypto/cavium/cpt/cpt_hw_types.h
line: 268

*	which if the line hits and is is dirty will cause the line to be

changed to:
*	which if the line hits and it is dirty will cause the line to be
Signed-off-by: NJiang Jian <jiangjian@cdjrlc.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/cavium/cpt/cpt_hw_types.h

@@ -265,7 +265,7 @@ union cptx_pf_exe_bist_status {
  *	big-endian format in memory.
  *  iqb_ldwb:1 [7:7](R/W) Instruction load don't write back.
  *	0 = The hardware issues NCB transient load (LDT) towards the cache,
- *	which if the line hits and is is dirty will cause the line to be
+ *	which if the line hits and it is dirty will cause the line to be
  *	written back before being replaced.
  *	1 = The hardware issues NCB LDWB read-and-invalidate command towards
  *	the cache when fetching the last word of instructions; as a result the