[Mammoth] Move most classes to the mmth namespace.

lib/mammoth/util/init.cpp

@@ -17,7 +17,7 @@ uint64_t gBootPciVmmoCap = 0;
 uint64_t gBootFramebufferVmmoCap = 0;
 
 z_err_t ParseInitPort(uint64_t init_port_cap) {
-  PortServer port = PortServer::AdoptCap(init_port_cap);
+  mmth::PortServer port = mmth::PortServer::AdoptCap(init_port_cap);
   z_err_t ret;
   uint64_t init_sig, init_cap;
   while ((ret = port.PollForIntCap(&init_sig, &init_cap)) != glcr::EMPTY) {

lib/mammoth/util/memory_region.cpp

@@ -5,6 +5,8 @@
 #include "util/debug.h"
 #include "util/init.h"
 
+namespace mmth {
+
 OwnedMemoryRegion::OwnedMemoryRegion(OwnedMemoryRegion&& other)
     : OwnedMemoryRegion(other.vmmo_cap_, other.vaddr_, other.size_) {
   other.vmmo_cap_ = 0;
@@ -68,3 +70,5 @@ z_cap_t OwnedMemoryRegion::DuplicateCap() {
   check(ZCapDuplicate(vmmo_cap_, kZionPerm_All, &cap));
   return cap;
 }
+
+}  // namespace mmth

lib/mammoth/util/memory_region.h

@@ -3,6 +3,7 @@
 #include <stdint.h>
 #include <ztypes.h>
 
+namespace mmth {
 /*
  * Memory Region class that unmaps its memory and releases its
  * capability when it goes out of scope.
@@ -41,3 +42,5 @@ class OwnedMemoryRegion {
   // TODO: We may want to differentiate between VMMO size and mapped size?
   uint64_t size_ = 0;
 };
+
+}  // namespace mmth