refactor(cpus): replace adr with adr_l

Replace "adr" with "adr_l" to handle symbols or labels that exceeds 1MB
access range. This modification resolves the link error.

Change-Id: I9eba2e34c0a303b40e4c7b3ea7c5b113f4c6d989
diff --git a/bl31/aarch64/runtime_exceptions.S b/bl31/aarch64/runtime_exceptions.S
index 962c362..e47b082 100644
--- a/bl31/aarch64/runtime_exceptions.S
+++ b/bl31/aarch64/runtime_exceptions.S
@@ -450,7 +450,7 @@
 	 *
 	 * handler = (base + off) + (index << log2(size))
 	 */
-	adr	x11, (__RT_SVC_DESCS_START__ + RT_SVC_DESC_HANDLE)
+	adr_l	x11, (__RT_SVC_DESCS_START__ + RT_SVC_DESC_HANDLE)
 	lsl	w10, w15, #RT_SVC_SIZE_LOG2
 	ldr	x15, [x11, w10, uxtw]