mmc: meson: update doc to support Meson-AXG platform

Explicitly update the docomentation to support the Meson-AXG platform.

Signed-off-by: Nan Li <nan.li@amlogic.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@baylibre.com>
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index cf15684..fa02faf 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -345,11 +345,11 @@
 	  If unsure, say N.
 
 config MMC_MESON_GX
-	tristate "Amlogic S905/GX* SD/MMC Host Controller support"
+	tristate "Amlogic S905/GX*/AXG SD/MMC Host Controller support"
 	depends on ARCH_MESON && MMC
 	help
 	  This selects support for the Amlogic SD/MMC Host Controller
-	  found on the S905/GX* family of SoCs.  This controller is
+	  found on the S905/GX*/AXG family of SoCs.  This controller is
 	  MMC 5.1 compliant and supports SD, eMMC and SDIO interfaces.
 
 	  If you have a controller with this interface, say Y here.