rtc: add missing MODULE_DESCRIPTION() macro

On x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rtc/lib_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rtc/rtc-goldfish.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rtc/rtc-omap.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rtc/rtc-rc5t583.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rtc/rtc-tps65910.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/rtc/rtc-twl.o

Add the missing invocation of the MODULE_DESCRIPTION() macro to all
files which have a MODULE_LICENSE(). This includes rtc-mpc5121.c,
which does not produce a warning with the x86 allmodconfig since it is
not built for x86, but it may cause this warning with Freescale PPC
configurations.

Signed-off-by: Jeff Johnson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Belloni <[email protected]>
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 13f8ce0..2cfacdd 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -685,4 +685,5 @@ static struct platform_driver twl4030rtc_driver = {
 module_platform_driver(twl4030rtc_driver);
 
 MODULE_AUTHOR("Texas Instruments, MontaVista Software");
+MODULE_DESCRIPTION("TI TWL4030/TWL5030/TWL6030/TPS659x0 RTC driver");
 MODULE_LICENSE("GPL");