crypto: picoxcell - Fix the name of the module in the description of CRYPTO_DEV_PICOXCELL

The help section says that the module will be called 'pipcoxcell_crypto'.
This is likely a typo.
Use 'picoxcell_crypto' instead
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -393,7 +393,7 @@ config CRYPTO_DEV_PICOXCELL
 	  Picochip picoXcell SoC devices. Select this for IPSEC ESP offload
 	  and for 3gpp Layer 2 ciphering support.
 
-	  Saying m here will build a module named pipcoxcell_crypto.
+	  Saying m here will build a module named picoxcell_crypto.
 
 config CRYPTO_DEV_SAHARA
 	tristate "Support for SAHARA crypto accelerator"