Fix build error: nonnull argument compared to NULL

Shows up in GCC6:

chips/p9/procedures/hwp/memory/lib/utils/find.H:437:5:
error nonnull argument ?i_array? compared to NULL [-Werror=nonnull-compare]

Change-Id: I25db14d9d9875c1f61f894b3d0df4dda6100f44d
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/37856
Reviewed-by: JACOB L. HARVEY <jlharvey@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: ANDRE A. MARIN <aamarin@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36982
Tested-by: Jenkins OP Build CI <op-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>

Author: stewartsmith

src/import/chips/p9/procedures/hwp/memory/lib/utils/find.H

@@ -434,12 +434,6 @@ fapi2::ReturnCode find_value_from_key( const std::pair<T, OT> (&i_array)[N],
                                        OT& o_value)
 {
     // TK Use sort and binary search for larger arrays
-    if (i_array == nullptr)
-    {
-        FAPI_ERR("nullptr passed to the find_value_from_key function");
-        return fapi2::FAPI2_RC_INVALID_PARAMETER;
-    }
-
     for (size_t i = 0; i < N; i++)
     {
         if (i_array[i].first == i_key)