PM: Fix for cyclic inclusion of header files.

HWP using this utility to collect FFDC fail to compile
because of cyclic inclusion of header files in
p9_eq_clear_atomic_lock.H. Commit resolves this
issue.

Change-Id: Idbb269a48bb9765194ae6616f4b76643f4ac917c
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/42347
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: AMIT J. TENDOLKAR <amit.tendolkar@in.ibm.com>
Reviewed-by: BRIAN D. VICTOR <brian.d.victor1@ibm.com>
Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/42349
Reviewed-by: Hostboot Team <hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/import/chips/p9/procedures/hwp/ffdc/p9_eq_clear_atomic_lock.C

@@ -32,6 +32,7 @@
 /// *HWP Level           : 2
 /// *HWP Consumed by     : SBE, HB
 
+#include <fapi2.H>
 #include <p9_quad_scom_addresses.H>
 #include <p9_quad_scom_addresses_fld.H>
 #include <p9_eq_clear_atomic_lock.H>

src/import/chips/p9/procedures/hwp/ffdc/p9_eq_clear_atomic_lock.H

@@ -40,7 +40,7 @@
 //------------------------------------------------------------------------------
 // Includes
 //------------------------------------------------------------------------------
-#include <fapi2.H>
+#include <return_code.H>
 #include <error_info_defs.H>
 
 #ifndef __PPE__