the array count in the for loop is miscalculated

patch by Alexander <necheffa.misc@gmail.com>

Code:
--- memtest86+-5.01-orig/controller.c    2013-08-09 22:01:58.000000000 -0400
+++ memtest86+-5.01/controller.c    2014-06-22 11:01:17.347923472 -0400
@@ -292,7 +292,7 @@ static void setup_nhm(void)
 
     /* First, locate the PCI bus where the MCH is located */
 
-    for(i = 0; i < sizeof(possible_nhm_bus); i++) {
+    for(i = 0; i < sizeof(possible_nhm_bus) / sizeof(possible_nhm_bus[0]); i++) {
         pci_conf_read( possible_nhm_bus[i], 3, 4, 0x00, 2, &vid);
         pci_conf_read( possible_nhm_bus[i], 3, 4, 0x02, 2, &did);
         vid &= 0xFFFF;
@@ -327,7 +327,7 @@ static void setup_nhm32(void)
     ctrl.mode = ECC_NONE;
 
     /* First, locate the PCI bus where the MCH is located */
-    for(i = 0; i < sizeof(possible_nhm_bus); i++) {
+    for(i = 0; i < sizeof(possible_nhm_bus) / sizeof(possible_nhm_bus[0]); i++) {
         pci_conf_read( possible_nhm_bus[i], 3, 4, 0x00, 2, &vid);
         pci_conf_read( possible_nhm_bus[i], 3, 4, 0x02, 2, &did);
         vid &= 0xFFFF;