pcuif_proto: cosmetic: rename struct member "h" to "hopping"

struct gsm_pcu_if_info_ts has a struct member "h", which controls
frequency hopping. This struct member is named "hopping" in osmo-bts, so
lets rename it here as well to be consistent.

Change-Id: I3156b39cc91da07ee3f97e8c8be60fc989cf112b
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index f964b78..c1271a4 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -880,7 +880,7 @@
 				pdch->tsc = its->tsc;
 
 				/* (Optional) frequency hopping parameters */
-				if (its->h) {
+				if (its->hopping) {
 					pdch->fh.enabled = true;
 					pdch->fh.maio    = its->maio;
 					pdch->fh.hsn     = its->hsn;