lib: cmsis_rtos_v1: replace an else case

Replace an else-if case in osSemaphoreWait with
else to account for both EBUSY and EAGAIN return
values from k_sem_take. The return value would be
0 for osSemaphoreWait in both cases.

Signed-off-by: Niranjhana N <niranjhana.n@intel.com>
diff --git a/lib/cmsis_rtos_v1/cmsis_semaphore.c b/lib/cmsis_rtos_v1/cmsis_semaphore.c
index 69c93f2..41da2b9 100644
--- a/lib/cmsis_rtos_v1/cmsis_semaphore.c
+++ b/lib/cmsis_rtos_v1/cmsis_semaphore.c
@@ -68,11 +68,9 @@
 	 */
 	if (status == 0) {
 		return k_sem_count_get(semaphore) + 1;
-	} else if (status == -EAGAIN) {
+	} else {
 		return 0;
 	}
-
-	return -1;
 }
 
 /**