sunxi: Fix CONFIG_SUNXI_GMAC references

SUNXI_GMAC was still used to configure the code where as the
same has been renamed and moved to Kconfig in below commit
"sunxi: Move SUNXI_GMAC to Kconfig"
(sha1: 4d43d065db3262f9a9918ba72457bf36dfb8e0bb)

Signed-off-by: Dave Prue <dave@prue.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Tested-by: Mark Kettenis <kettenis@openbsd.org>
[Tweek commit message, config_whitelist.txt, build-whitelist.sh]
Signed-off-by: Jagan Teki <jagan@openedev.com>
diff --git a/scripts/build-whitelist.sh b/scripts/build-whitelist.sh
index 7d8160d..6feb9b6 100755
--- a/scripts/build-whitelist.sh
+++ b/scripts/build-whitelist.sh
@@ -13,10 +13,10 @@
 # There are two independent greps. The first pulls out the component parts
 # of CONFIG_SYS_EXTRA_OPTIONS. An example is:
 #
-#	SUNXI_GMAC,AHCI,SATAPWR=SUNXI_GPB(8)
+#	SUN7I_GMAC,AHCI,SATAPWR=SUNXI_GPB(8)
 #
 # We want this to produce:
-#	CONFIG_SUNXI_GMAC
+#	CONFIG_SUN7I_GMAC
 #	CONFIG_AHCI
 #	CONFIG_SATAPWR
 #