Kernel: Stop debug spam when using mmap on /dev/mem device

This is not really useful and quite annoying so let's disable it by
default.

Kernel/Debug.h.in

@@ -207,6 +207,10 @@
 #cmakedefine01 MOUSE_DEBUG
 #endif
 
+#ifndef MEMORY_DEVICE_DEBUG
+#cmakedefine01 MEMORY_DEVICE_DEBUG
+#endif
+
 #ifndef MULTIPROCESSOR_DEBUG
 #cmakedefine01 MULTIPROCESSOR_DEBUG
 #endif

Kernel/Devices/MemoryDevice.cpp

@@ -57,15 +57,13 @@ ErrorOr<Memory::Region*> MemoryDevice::mmap(Process& process, OpenFileDescriptio
     // is to be set to the page base of that start address.
     VERIFY(viewed_address == viewed_address.page_base());
 
-    dbgln("MemoryDevice: Trying to mmap physical memory at {} for range of {} bytes", viewed_address, range.size());
     if (!MM.is_allowed_to_read_physical_memory_for_userspace(viewed_address, range.size())) {
-        dbgln("MemoryDevice: Trying to mmap physical memory at {} for range of {} bytes failed due to violation of access", viewed_address, range.size());
+        dbgln_if(MEMORY_DEVICE_DEBUG, "MemoryDevice: Trying to mmap physical memory at {} for range of {} bytes failed due to violation of access", viewed_address, range.size());
         return EINVAL;
     }
 
     auto vmobject = TRY(Memory::AnonymousVMObject::try_create_for_physical_range(viewed_address, range.size()));
 
-    dbgln("MemoryDevice: Mapped physical memory at {} for range of {} bytes", viewed_address, range.size());
     return process.address_space().allocate_region_with_vmobject(
         range,
         move(vmobject),

Meta/CMake/all_the_debug_macros.cmake

@@ -117,6 +117,7 @@ set(MATROSKA_DEBUG ON)
 set(MATROSKA_TRACE_DEBUG ON)
 set(MASTERPTY_DEBUG ON)
 set(MBR_DEBUG ON)
+set(MEMORY_DEVICE_DEBUG ON)
 set(MEMORY_DEBUG ON)
 set(MENU_DEBUG ON)
 set(MENUS_DEBUG ON)