flags: add missing entries to bts_impl_flag_desc[]

The following output can be seen when doing 'show bts' in the VTY:

  BTS model specific (internal) flags:
    001 Measurement and Payload data combined
    003 unknown 0x8

Fix this by adding the missing values to the value-string array.

Change-Id: I83e5065f9f80b4f81e9767f184c8dc027883025a
Fixes: 0277cddab "sysmo,oc2g,lc15: Make RadioChannel MO depend on RadioCarrier MO"
Fixes: ee5eb6169 "l1sap: check if BTS model supports interference reporting"

src/common/bts.c

@@ -202,6 +202,8 @@ const char *btsatttr2str(enum bts_attribute v)
 const struct value_string bts_impl_flag_desc[] = {
 	{ BTS_INTERNAL_FLAG_MS_PWR_CTRL_DSP,	"DSP/HW based MS Power Control Loop" },
 	{ BTS_INTERNAL_FLAG_MEAS_PAYLOAD_COMB,	"Measurement and Payload data combined" },
+	{ BTS_INTERNAL_FLAG_NM_RCHANNEL_DEPENDS_RCARRIER, "OML RadioChannel MO depends on RadioCarrier MO" },
+	{ BTS_INTERNAL_FLAG_INTERF_MEAS,	"Uplink interference measurements" },
 	{ 0, NULL }
 };