Capitalize namespacing structs

This helps to avoid name clashes when breaking up modules into packages.

src/hulk/mtrr.d

@@ -31,7 +31,7 @@ enum ulong MTRRPHYSBASE_TYPE_MASK = 0xFFu;
 enum ulong MTRRPHYSMASK_PHYSMASK_MASK = 0x000F_FFFF_FFFF_F000u;
 enum ulong MTRRPHYSMASK_VALID = 0x800u;
 
-struct mtrr
+struct Mtrr
 {
     public static void initialize()
     {
@@ -41,7 +41,7 @@ struct mtrr
         cpuid1(&ebx, &ecx, &edx);
         if ((edx & CPUID_1_EDX_MTRR) == 0u)
         {
-            klog.writefln("CPU does not support MTRR");
+            Klog.writefln("CPU does not support MTRR");
             return;
         }
         const(ulong) mtrrcap = rdmsr(MSR_MTRRCAP);