[media] mmc/Kconfig: Improve driver name for siano mmc/sdio driver

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/mmc/Kconfig

@@ -1 +1,2 @@
+comment "Supported MMC/SDIO adapters"
 source "drivers/media/mmc/siano/Kconfig"