MAINTAINERS: add myself as maintainer of ixp4xx_crypto

No maintainer exists for ixp4xx_crypto, since I have access to a board
with it, I propose to maintain it.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

MAINTAINERS

@@ -9236,6 +9236,12 @@ F:	Documentation/admin-guide/media/ipu3_rcb.svg
 F:	Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst
 F:	drivers/staging/media/ipu3/
 
+INTEL IXP4XX CRYPTO SUPPORT
+M:	Corentin Labbe <clabbe@baylibre.com>
+L:	linux-crypto@vger.kernel.org
+S:	Maintained
+F:	drivers/crypto/ixp4xx_crypto.c
+
 INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
 M:	Krzysztof Halasa <khalasa@piap.pl>
 S:	Maintained