Fix for packing the NV keyword struct

Change-Id: Ib6845a5965a3c3356333ae912d2f03ab9d035850
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/45288
Reviewed-by: VENKATESH SAINATH <venkatesh.sainath@in.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
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>

src/usr/hdat/hdatutil.H

@@ -150,7 +150,7 @@ typedef struct{
     uint8_t  version;   // Version of the structure = 0x01 start
     uint8_t  config;    // Configuration specifier : redbud=0x01,sequoia=0x02
     uint8_t  reserved[249];  // keyword is 255 bytes long
-}hdatNVKwdStruct_t;
+}__attribute__ ((packed)) hdatNVKwdStruct_t;
 
 enum hdatSMPLinkUsage
 {