rspro_util: Add rspro_comp_id_retrieve()

This function can be used to obtain an 'sturct app_comp_id' from
received/decoded asn1c ComponentIdentity_t.

Change-Id: I7c68cee171a65cb83a802285531b677cdf37108b
diff --git a/src/rspro_util.h b/src/rspro_util.h
index 0e9a026..7a0c8ed 100644
--- a/src/rspro_util.h
+++ b/src/rspro_util.h
@@ -36,3 +36,5 @@
 				     const uint8_t *tpdu, unsigned int tpdu_len);
 RsproPDU_t *rspro_gen_TpduCard2Modem(const BankSlot_t *bank, const ClientSlot_t *client,
 				     const uint8_t *tpdu, unsigned int tpdu_len);
+
+void rspro_comp_id_retrieve(struct app_comp_id *out, const ComponentIdentity_t *in);