MAINTAINERS: Drop arch/*/lib/crypto/ pattern

MAINTAINERS: Drop arch/*/lib/crypto/ pattern

Since all files arch/*/lib/crypto/* have been moved into lib/crypto/,
remove the arch/*/lib/crypto/ file pattern from MAINTAINERS.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://lore.kernel.org/r/20250619191908.134235-10-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>