dts: Add new channelId for PUB

The following new channelId is necessary for PUB (Paraguay, Uruguay,
Bolivia):
- ro.carrier=openpub / channelId=44 (decimal);

Change-Id: I85c349c79e3fdd602c56d0af656b561a88d32ad9
Reviewed-on: https://gerrit.mot.com/2674091
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Alessandro Ramos Bernardes Dias <aledias@motorola.com>
Reviewed-by: Zhenxin Xi <xizx@motorola.com>
Submit-Approved: Jira Key

qcom/carrier-channel-ids.dtsi

@@ -58,7 +58,7 @@
 		"openmx",	/* 41 */
 		"altmx",	/* 42 */
 		"openpe",	/* 43 */
-		"undefined",	/* 44 */
+		"openpub",	/* 44 */
 		"undefined",	/* 45 */
 		"undefined",	/* 46 */
 		"undefined",	/* 47 */