arm64/dt: Create channelid for Spectrum

- New carrier Spectrum required channelid - ro.carrier for device
customization. FEATURE-6009
- Create entry "spectrum" at position 154 (0x9A)

Change-Id: Id4d471f929acc7746dddd130980322c2bc3b61bd
Reviewed-on: https://gerrit.mot.com/1911413
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Reviewed-by: Dimitri Correa De Alkmin E Silva <wds042@motorola.com>
Tested-by: Jira Key
Reviewed-by: Regina Mitsue Azuma <reginaazuma@motorola.com>
Reviewed-by: Tarciano Facco Pegoraro <tarciano@motorola.com>
Reviewed-by: Igor Kovalenko <igork@motorola.com>
Submit-Approved: Jira Key

qcom/carrier-channel-ids.dtsi

@@ -168,7 +168,7 @@
 		"fi",		/* 151 */
 		"vzwpre",	/* 152 */
 		"boost",	/* 153 */
-		"undefined",	/* 154 */
+		"spectrum",	/* 154 */
 		"undefined",	/* 155 */
 		"undefined",	/* 156 */
 		"undefined",	/* 157 */