Kernel: Aggregate TLB flush requests for Regions for SMP

Rather than sending one TLB flush request for each page,
aggregate them so that we're not spamming the other
processors with FlushTLB IPIs.

Kernel/Arch/i386/CPU.cpp

@@ -1405,7 +1405,7 @@ void Processor::flush_tlb_local(VirtualAddress vaddr, size_t page_count)
     while (page_count > 0) {
         asm volatile("invlpg %0"
              :
-             : "m"(*(char*)vaddr.get())
+             : "m"(*ptr)
              : "memory");
         ptr += PAGE_SIZE;
         page_count--;