ASN.1: add module description

This is needed to avoid a build warning:

WARNING: modpost: missing MODULE_DESCRIPTION() in lib/asn1_decoder.o

Link: https://lkml.kernel.org/r/[e-mail]
Fixes: 6c6c1fc09de3 ("modpost: require a MODULE_DESCRIPTION()")
Signed-off-by: Arnd Bergmann <[e-mail]>
Tested-by: Geert Uytterhoeven <[e-mail]>
Cc: Jeff Johnson <[e-mail]>
Cc: Masahiro Yamada <[e-mail]>
Cc: Stehen Rothwell <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

lib/asn1_decoder.c

···
 }
 EXPORT_SYMBOL_GPL(asn1_ber_decoder);
 
+MODULE_DESCRIPTION("Decoder for ASN.1 BER/DER/CER encoded bytestream");
 MODULE_LICENSE("GPL");