mips: cacheinfo: Remove unnecessary increment of level

kernel test robot throws below warning ->

arch/mips/kernel/cacheinfo.c:112:3: warning: Variable 'level' is
modified but its new value is never used. [unreadVariable]

Remove unnecessary increment of level at the end.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/kernel/cacheinfo.c

@@ -107,10 +107,8 @@ static int __populate_cache_leaves(unsigned int cpu)
 		level++;
 	}
 
-	if (c->tcache.waysize) {
+	if (c->tcache.waysize)
 		populate_cache(tcache, this_leaf, level, CACHE_TYPE_UNIFIED);
-		level++;
-	}
 
 	this_cpu_ci->cpu_map_populated = true;