ipc: Apply suggestions from code review

Co-authored-by: Kamil Gawor <40163811+KAGA164@users.noreply.github.com>
Co-authored-by: Dominik Chat <dominik.chat@nordicsemi.no>

subsys/ipc/ipc_service/backends/Kconfig

@@ -56,7 +56,7 @@ config IPC_SERVICE_BACKEND_ICMSG_WITH_BUF
 	select IPC_SERVICE_ICMSG
 	help
 	  Choosing this backend results in multi endpoint implementation based
-	  on dynamically allocated buffers. References to them are send over
+	  on dynamically allocated buffers. References to them are sent over
 	  ICMsg circular buffer.
 
 rsource "Kconfig.icmsg_me"

subsys/ipc/ipc_service/backends/Kconfig.icmsg_with_buf

@@ -4,7 +4,7 @@
 if IPC_SERVICE_BACKEND_ICMSG_WITH_BUF
 
 config IPC_SERVICE_BACKEND_ICMSG_WITH_BUF_NUM_EP
-	int "Endpoints number"
+	int "Endpoints count"
 	range 1 251
 	default 4
 	help

subsys/ipc/ipc_service/backends/ipc_icmsg_with_buf.c

@@ -137,7 +137,7 @@ struct icmsg_with_buf_config {
 	struct channel_config rx;		/* RX channel config. */
 	struct channel_config tx;		/* RX channel config. */
 	sys_bitarray_t *tx_usage_bitmap;	/* Bit is set when TX block is in use */
-	sys_bitarray_t *rx_hold_bitmap;		/* Bit is set is buffer starting at this
+	sys_bitarray_t *rx_hold_bitmap;		/* Bit is set, if buffer starting at this
 						 * block should be kept after exit from
 						 * receive handler.
 						 */
@@ -167,7 +167,7 @@ struct backend_data {
 					 *   registered locally.
 					 */
 	uint8_t ept_count;		/* Number of registered endpoints. */
-	bool icmsg_bounded;		/* ISmsg was bounded already. */
+	bool icmsg_bounded;		/* ICMsg was bounded already. */
 };
 
 struct block_header {
@@ -479,7 +479,7 @@ static int icmsg_send_wrapper(struct backend_data *dev_data, uint8_t addr_or_msg
 }
 
 /**
- * Release received buffer. This function will just sends release message over ICMsg.
+ * Release received buffer. This function will just send release message over ICMsg.
  *
  * @param[in] buffer	Buffer to release
  * @param[in] msg_type	Message type: MSG_RELEASE_BOUND or MSG_RELEASE_DATA