- Create channel ID for Optus Australia

Creating a new channel ID (ro.carrier) for Optus Australia.
New channel id name is 'optus' and is been applied to all
QC active Kernels. This change is to apply to 4.19

Change-Id: I0387abf6a97467ba2d8fe84ef1daacc4a5de4b5c
Reviewed-on: https://gerrit.mot.com/1857767
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Tarciano Facco Pegoraro <tarciano@motorola.com>
Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com>
Submit-Approved: Jira Key

qcom/carrier-channel-ids.dtsi

@@ -227,7 +227,7 @@
 		"retsea",	/* 210 */
 		"retjp",	/* 211 */
 		"softbank",	/* 212 */
-		"undefined",	/* 213 */
+		"optus",	/* 213 */
 		"undefined",	/* 214 */
 		"undefined",	/* 215 */
 		"undefined",	/* 216 */