merge filename and modify references to iseries/it_lp_naca.h

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

arch/powerpc/kernel/setup_64.c

@@ -56,7 +56,7 @@
 #include <asm/page.h>
 #include <asm/mmu.h>
 #include <asm/lmb.h>
-#include <asm/iSeries/ItLpNaca.h>
+#include <asm/iseries/it_lp_naca.h>
 #include <asm/firmware.h>
 #include <asm/systemcfg.h>
 #include <asm/xmon.h>