auxdisplay: linedisp: add missing MODULE_DESCRIPTION() macro

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/auxdisplay/line-display.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>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/auxdisplay/line-display.c

@@ -396,4 +396,5 @@ void linedisp_unregister(struct linedisp *linedisp)
 }
 EXPORT_SYMBOL_NS_GPL(linedisp_unregister, LINEDISP);
 
+MODULE_DESCRIPTION("Character line display core support");
 MODULE_LICENSE("GPL");