doxygen: fix various typos in commands \param and \returns

Change-Id: If87cec3739449c6a54e24fb2cb81e746d8244da2
diff --git a/src/gb/gprs_ns2_message.c b/src/gb/gprs_ns2_message.c
index cc95334..1b986fe 100644
--- a/src/gb/gprs_ns2_message.c
+++ b/src/gb/gprs_ns2_message.c
@@ -282,7 +282,7 @@
 
 /*! Transmit a NS-RESET on a given NS-VC.
  *  \param[in] nsvc NS-VC used for transmission
- *  \paam[in] cause Numeric NS cause value
+ *  \param[in] cause Numeric NS cause value
  *  \returns 0 in case of success */
 int ns2_tx_reset(struct gprs_ns2_vc *nsvc, uint8_t cause)
 {