[HALX86] Rearrange files in x86 HAL

- Rename UP -> PIC. The "up" folder in fact contains the code for
  managing the Intel 8259 PIC chip
- Move amd64/processor.c -> apic/processor.c. The code is not tied to
  amd64
- Remove platform from "halinit*" files. They already reside in the
  corresponding folder

hal/halx86/apic/halinit.c

@@ -0,0 +1,62 @@
+/*
+ * PROJECT:     ReactOS Hardware Abstraction Layer
+ * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
+ * PURPOSE:     Initialize the x86 HAL
+ * COPYRIGHT:   Copyright 2011 Timo Kreuzer <timo.kreuzer@reactos.org>
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include <hal.h>
+#define NDEBUG
+#include <debug.h>
+#include "apic.h"
+
+VOID
+NTAPI
+ApicInitializeLocalApic(ULONG Cpu);
+
+/* GLOBALS ******************************************************************/
+
+const USHORT HalpBuildType = HAL_BUILD_TYPE;
+
+/* FUNCTIONS ****************************************************************/
+
+VOID
+NTAPI
+HalpInitProcessor(
+    IN ULONG ProcessorNumber,
+    IN PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+    /* Initialize the local APIC for this cpu */
+    ApicInitializeLocalApic(ProcessorNumber);
+
+    /* Initialize profiling data (but don't start it) */
+    HalInitializeProfiling();
+
+    /* Initialize the timer */
+    //ApicInitializeTimer(ProcessorNumber);
+
+}
+
+VOID
+HalpInitPhase0(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+
+    /* Enable clock interrupt handler */
+    HalpEnableInterruptHandler(IDT_INTERNAL,
+                               0,
+                               APIC_CLOCK_VECTOR,
+                               CLOCK2_LEVEL,
+                               HalpClockInterrupt,
+                               Latched);
+}
+
+VOID
+HalpInitPhase1(VOID)
+{
+    /* Initialize DMA. NT does this in Phase 0 */
+    HalpInitDma();
+}
+
+/* EOF */