Revert "brcm47xx: Fix sysupgrade with E1200v1"

This reverts commit 31e9445b.

"Linksys E1200 V1" is not a valid board name, as the brcm47xx arch code
can not detect this device. Stefan Lippers-Hollmann also found a typo in
this patch "cybetran" instead of "cybertan".

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/brcm47xx/base-files/lib/upgrade/platform.sh

@@ -34,7 +34,6 @@ platform_expected_image() {
 		"Linksys E1000 V1")	echo "cybertan E100"; return;;
 		"Linksys E1000 V2")	echo "cybertan E100"; return;;
 		"Linksys E1000 V2.1")	echo "cybertan E100"; return;;
-		"Linksys E1200 V1")	echo "cybetran E120"; return;;
 		"Linksys E1200 V2")	echo "cybertan E122"; return;;
 		"Linksys E2000 V1")	echo "cybertan 32XN"; return;;
 		"Linksys E3000 V1")	echo "cybertan 61XN"; return;;