hwrng: omap - add missing MODULE_DESCRIPTION() macro

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/hw_random/omap-rng.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/hw_random/omap3-rom-rng.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/omap-rng.c

@@ -564,4 +564,5 @@ static struct platform_driver omap_rng_driver = {
 module_platform_driver(omap_rng_driver);
 MODULE_ALIAS("platform:omap_rng");
 MODULE_AUTHOR("Deepak Saxena (and others)");
+MODULE_DESCRIPTION("RNG driver for TI OMAP CPU family");
 MODULE_LICENSE("GPL");

drivers/char/hw_random/omap3-rom-rng.c

@@ -178,4 +178,5 @@ module_platform_driver(omap3_rom_rng_driver);
 MODULE_ALIAS("platform:omap3-rom-rng");
 MODULE_AUTHOR("Juha Yrjola");
 MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
+MODULE_DESCRIPTION("RNG driver for TI OMAP3 CPU family");
 MODULE_LICENSE("GPL");