[S390] sclp_cpi module license.

sclp_cpi is GPL. Make the module not taint the kernel

Signed-off-by: Christian Borntraeger <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/char/sclp_cpi.c

···
 	.send_mask = EvTyp_CtlProgIdent_Mask
 };
 
+MODULE_LICENSE("GPL");
+
 MODULE_AUTHOR(
 	"Martin Peschke, IBM Deutschland Entwicklung GmbH "
 	"<[e-mail]>");