crypto: MAINTAINERS - fix file path for SHA multibuffer code

"arch/x86/crypto/sha*-mb" needs a trailing slash, since it refers to
directories.  Otherwise get_maintainer.pl doesn't find the entry.
Signed-off-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

MAINTAINERS

@@ -7350,7 +7350,7 @@ M:	Megha Dey <megha.dey@linux.intel.com>
 R:	Tim Chen <tim.c.chen@linux.intel.com>
 L:	linux-crypto@vger.kernel.org
 S:	Supported
-F:	arch/x86/crypto/sha*-mb
+F:	arch/x86/crypto/sha*-mb/
 F:	crypto/mcryptd.c
 
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