MAINTAINERS: update caam crypto driver maintainers list

Adding Gaurav as caam maintainer.
Signed-off-by: NPankaj Gupta <pankaj.gupta@nxp.com>
Reviewed-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

MAINTAINERS

@@ -7511,6 +7511,7 @@ F:	include/video/
 FREESCALE CAAM (Cryptographic Acceleration and Assurance Module) DRIVER
 M:	Horia Geantă <horia.geanta@nxp.com>
 M:	Pankaj Gupta <pankaj.gupta@nxp.com>
+M:	Gaurav Jain <gaurav.jain@nxp.com>
 L:	linux-crypto@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/crypto/fsl-sec4.txt