phal: Added extensions/phal folder

Added phal specific folder to keep all phal feature
based function in common place

Moved phal error specific source files to  extensions/phal

Tested: build verified.

Signed-off-by: Jayanth Othayoth <ojayanth@in.ibm.com>
Change-Id: Iabae2689444f355008802950a293e7c69cb19553
diff --git a/procedures/phal/check_host_running.cpp b/procedures/phal/check_host_running.cpp
index 92001b9..a85bf4d 100644
--- a/procedures/phal/check_host_running.cpp
+++ b/procedures/phal/check_host_running.cpp
@@ -4,8 +4,8 @@
 }
 
 #include "common_utils.hpp"
+#include "extensions/phal/create_pel.hpp"
 #include "p10_cfam.hpp"
-#include "phalerror/create_pel.hpp"
 #include "procedures/phal/common_utils.hpp"
 #include "registration.hpp"