Remove Doxygen-style comments, change formatting to wrap comments

kernel/mm/pmm.c

@@ -38,8 +38,8 @@ void pmm_init (void) {
       struct pmm_region* pmm_region = &pmm.regions[region];
 
       /*
-       * We need to calculate sizes for the pmm region and the bitmap. The bitmap MUSTN'T include it's
-       * own region within the bit range.
+       * We need to calculate sizes for the pmm region and the bitmap. The bitmap MUSTN'T include
+       * it's own region within the bit range.
        * */
 
       size_t size = align_down (entry->length, PAGE_SIZE);