[dev][uart][pl011] first step moving pl011 driver out of qemu-virt-arm

No real functional change, but move the driver implementation out to a
separate place so it can be made to be platform independent.

dev/uart/pl011/include/dev/uart/pl011.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2024 Travis Geiselbrecht
+ *
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT
+ */
+#pragma once
+
+#include <dev/uart.h>
+
+#define PL011_FLAG_DEBUG_UART (1u<<0)
+
+void pl011_init_early(int port, uintptr_t base, uint32_t irq, uint32_t flag);
+void pl011_init(int port);

dev/uart/pl011/rules.mk

@@ -0,0 +1,7 @@
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+MODULE := $(LOCAL_DIR)
+
+MODULE_SRCS += $(LOCAL_DIR)/uart.c
+
+include make/module.mk

platform/qemu-virt-arm/debug.c

@@ -7,13 +7,11 @@
  */
 #include <stdarg.h>
 #include <lk/reg.h>
-#include <stdio.h>
 #include <kernel/thread.h>
 #include <dev/uart.h>
 #include <platform/debug.h>
 #include <platform/qemu-virt.h>
 #include <target/debugconfig.h>
-#include <lk/reg.h>
 
 /* DEBUG_UART must be defined to 0 or 1 */
 #if defined(DEBUG_UART) && DEBUG_UART == 0

platform/qemu-virt-arm/platform.c

@@ -8,7 +8,6 @@
 #include <platform/qemu-virt.h>
 
 #include <arch.h>
-#include <inttypes.h>
 #include <lk/err.h>
 #include <lk/debug.h>
 #include <lk/trace.h>

platform/qemu-virt-arm/platform_p.h

@@ -7,5 +7,3 @@
  */
 #pragma once
 
-void platform_init_timer(void);
-

platform/qemu-virt-arm/rules.mk

@@ -15,10 +15,8 @@ WITH_SMP ?= 1
 
 LK_HEAP_IMPLEMENTATION ?= dlmalloc
 
-MODULE_SRCS += \
-    $(LOCAL_DIR)/debug.c \
-    $(LOCAL_DIR)/platform.c \
-    $(LOCAL_DIR)/uart.c
+MODULE_SRCS += $(LOCAL_DIR)/debug.c
+MODULE_SRCS += $(LOCAL_DIR)/platform.c
 
 MEMBASE := 0x40000000
 MEMSIZE ?= 0x08000000   # 512MB
@@ -30,10 +28,11 @@ MODULE_DEPS += \
     dev/interrupt/arm_gic \
     dev/power/psci \
     dev/timer/arm_generic \
+    dev/uart/pl011 \
+    dev/virtio/9p \
     dev/virtio/block \
     dev/virtio/gpu \
     dev/virtio/net \
-    dev/virtio/9p \
     lib/cbuf \
     lib/fdtwalk \
     lib/fs/9p \