amiflop: add missing MODULE_DESCRIPTION() macro

With ARCH=m68k, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/amiflop.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240617-md-m68k-drivers-block-v1-1-b200599a315e@quicinc.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/amiflop.c

@@ -232,6 +232,7 @@ static DEFINE_MUTEX(amiflop_mutex);
 static unsigned long int fd_def_df0 = FD_DD_3;     /* default for df0 if it doesn't identify */
 
 module_param(fd_def_df0, ulong, 0);
+MODULE_DESCRIPTION("Amiga floppy driver");
 MODULE_LICENSE("GPL");
 
 /*