theme: Capitalize EDL

TWRP used 'Edl', but everywhere else, it is 'EDL'.

Change-Id: I4f63185ffb96797da0d695b34857ee242cfa33e8
diff --git a/gui/theme/common/portrait.xml b/gui/theme/common/portrait.xml
index 125effe..d27aa53 100755
--- a/gui/theme/common/portrait.xml
+++ b/gui/theme/common/portrait.xml
@@ -2983,7 +2983,7 @@
 					</actions>
 				</listitem>
 
-				<listitem name="{@rb_edl_btn=Edl}">
+				<listitem name="{@rb_edl_btn=EDL}">
 					<condition var1="tw_edl_mode" var2="1"/>
 					<actions>
 						<action function="set">tw_back=reboot</action>