cpu_map: Add more signatures for Nehalem CPU models

Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/cpu_map/x86_Nehalem-IBRS.xml

 <cpus>
   <model name='Nehalem-IBRS'>
     <signature family='6' model='26'/> <!-- 0106a0 -->
+    <signature family='6' model='30'/> <!-- 0106e0 -->
+    <signature family='6' model='31'/> <!-- 0106f0 -->
+    <signature family='6' model='46'/> <!-- 0206e0 -->
     <vendor name='Intel'/>
     <feature name='apic'/>
     <feature name='clflush'/>

src/cpu_map/x86_Nehalem.xml

 <cpus>
   <model name='Nehalem'>
     <signature family='6' model='26'/> <!-- 0106a0 -->
+    <signature family='6' model='30'/> <!-- 0106e0 -->
+    <signature family='6' model='31'/> <!-- 0106f0 -->
+    <signature family='6' model='46'/> <!-- 0206e0 -->
     <vendor name='Intel'/>
     <feature name='apic'/>
     <feature name='clflush'/>