Print msg for single gpu

Change-Id: I2d23c73542add8973990ba96592016726994422e

samples/2_Cookbook/8_peer2peer/peer2peer.cpp

@@ -55,13 +55,9 @@ void checkPeer2PeerSupport()
 {
     int gpuCount;
     int canAccessPeer;
-    int p2pCapableDeviceCount=0;
 
     HIPCHECK(hipGetDeviceCount(&gpuCount));
 
-    if (gpuCount < 2)
-        printf("Peer2Peer application requires atleast 2 gpu devices");
-
     for (int currentGpu=0; currentGpu<gpuCount; currentGpu++)
     {
         HIPCHECK(hipSetDevice(currentGpu));
@@ -161,6 +157,12 @@ int main(){
 
     HIPCHECK(hipGetDeviceCount(&gpuCount));
 
+    if (gpuCount < 2)
+    {
+        printf("Peer2Peer application requires atleast 2 gpu devices");
+        return 0;
+    }
+
     currentGpu = 0;
     peerGpu = (currentGpu + 1);