s390/dasd: add missing MODULE_DESCRIPTION() macros

With ARCH=s390, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dasd_diag_mod.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dasd_eckd_mod.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dasd_fba_mod.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20240715112434.2111291-2-sth@linux.ibm.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/s390/block/dasd_diag.c

@@ -29,6 +29,7 @@
 #include "dasd_int.h"
 #include "dasd_diag.h"
 
+MODULE_DESCRIPTION("S/390 Support for DIAG access to DASD Disks");
 MODULE_LICENSE("GPL");
 
 /* The maximum number of blocks per request (max_blocks) is dependent on the

drivers/s390/block/dasd_eckd.c

@@ -44,6 +44,7 @@
 /* 64k are 128 x 512 byte sectors  */
 #define DASD_RAW_SECTORS_PER_TRACK 128
 
+MODULE_DESCRIPTION("S/390 DASD ECKD Disks device driver");
 MODULE_LICENSE("GPL");
 
 static struct dasd_discipline dasd_eckd_discipline;

drivers/s390/block/dasd_fba.c

@@ -32,6 +32,7 @@
 #define DASD_FBA_CCW_LOCATE 0x43
 #define DASD_FBA_CCW_DEFINE_EXTENT 0x63
 
+MODULE_DESCRIPTION("S/390 DASD FBA Disks device driver");
 MODULE_LICENSE("GPL");
 
 static struct dasd_discipline dasd_fba_discipline;