bts: Drop specific functions to add values to counters

It's super annoying seeing lots of functions being called everywhere
only to find out they are only incrementing a counter. Let's drop all
those functions and increment the counter so people looking at code
doesn't see dozens of code paths evyerwhere.

Most of the commit was generated by following sh snippet:
"""
 #!/bin/bash
define_pattern="^CREATE_COUNT_ADD_INLINE"
generic_func="do_rate_ctr_add"
grep -r -l "${define_pattern}" . | xargs cat | grep "${define_pattern}("| tr -d ",;" | tr "()" " " | awk '{ print $2 " " $3 }' >/tmp/hello

while read -r func_name ctr_name
do
 #echo "$func_name -> $ctr_name";
files="$(grep -r -l "${func_name}(" .)"
for f in $files; do
echo "$f: $func_name -> $ctr_name";
sed -i "s#${func_name}(#${generic_func}(${ctr_name}, #g" $f
done;
done < /tmp/hello

grep -r -l "void ${generic_func}" | xargs sed -i "/void ${generic_func}(CTR/d"
grep -r -l "$define_pattern" | xargs sed -i "/$define_pattern/d"
"""

Change-Id: I966221d6f9fb9bb4f6068bf45ca2978008a0efed
diff --git a/src/tbf_dl.cpp b/src/tbf_dl.cpp
index 5197717..dab1e29 100644
--- a/src/tbf_dl.cpp
+++ b/src/tbf_dl.cpp
@@ -630,14 +630,14 @@
 			&m_llc, &write_offset, &num_chunks, data, is_final, &payload_written);
 
 		if (payload_written > 0)
-			bts->rlc_dl_payload_bytes(payload_written);
+			bts->do_rate_ctr_add(CTR_RLC_DL_PAYLOAD_BYTES, payload_written);
 
 		if (ar == Encoding::AR_NEED_MORE_BLOCKS)
 			break;
 
 		LOGPTBFDL(this, LOGL_DEBUG, "Complete DL frame, len=%d\n", m_llc.frame_length());
 		gprs_rlcmac_dl_bw(this, m_llc.frame_length());
-		bts->llc_dl_bytes(m_llc.frame_length());
+		bts->do_rate_ctr_add(CTR_LLC_DL_BYTES, m_llc.frame_length());
 		m_llc.reset();
 
 		if (is_final) {