logging.h: fixup: shorter names for LOGGING_FILTER_* and LOGGING_CTX_*

My recent logging patch was merged to master a bit too soon. Accomodate the
request for naming that matches the general "LOG" prefix instead of "LOGGING".

libosmocore will not be backwards-compatible with the few commits from
change-id I5c343630020f4b108099696fd96c2111614c8067 up to this one. This and
following commits are backwards compatible with those before that short window.

See also:
* openbsc change-id Ib2ec5e4884aa90f48051ee2f832af557aa525991
* osmo-pcu change-id I4db4a668f2be07f3d55f848d38d1b490d8a7a685

Change-Id: I424fe3f12ea620338902b2bb8230544bde3f1a93
diff --git a/src/vty/logging_vty.c b/src/vty/logging_vty.c
index 30ee455..aabcaa7 100644
--- a/src/vty/logging_vty.c
+++ b/src/vty/logging_vty.c
@@ -287,7 +287,7 @@
 	}
 
 	vty_out(vty, " Log Filter 'ALL': %s%s",
-		tgt->filter_map & (1 << LOGGING_FILTER_ALL) ? "Enabled" : "Disabled",
+		tgt->filter_map & (1 << LOG_FLT_ALL) ? "Enabled" : "Disabled",
 		VTY_NEWLINE);
 
 	/* print application specific filters */
@@ -687,7 +687,7 @@
 	}
 
 	vty_out(vty, "  logging filter all %u%s",
-		tgt->filter_map & (1 << LOGGING_FILTER_ALL) ? 1 : 0, VTY_NEWLINE);
+		tgt->filter_map & (1 << LOG_FLT_ALL) ? 1 : 0, VTY_NEWLINE);
 	/* save filters outside of libosmocore, i.e. in app code */
 	if (osmo_log_info->save_fn)
 		osmo_log_info->save_fn(vty, osmo_log_info, tgt);