hw/char: Extract serial-mm

hw/char/serial currently contains the implementation of both TYPE_SERIAL and
TYPE_SERIAL_MM. According to serial_class_init(), TYPE_SERIAL is an internal
class while TYPE_SERIAL_MM is used by numerous machine types directly. Let's
move the latter into its own module which makes the dependencies more obvious
and the code more tidy.

The includes and the dependencies have been converted mechanically except in the
hw/char directories which were updated manually. The result was compile-tested.
Now, only hw/char makes direct use of TYPE_SERIAL:

  # grep -r -e "select SERIAL" | grep -v SERIAL_
  hw/char/Kconfig:    select SERIAL
  hw/char/Kconfig:    select SERIAL
  hw/char/Kconfig:    select SERIAL
  hw/char/Kconfig:    select SERIAL
  hw/char/Kconfig:    select SERIAL

  # grep -r -e "/serial\\.h"
  include/hw/char/serial-mm.h:#include "hw/char/serial.h"
  hw/char/serial-pci-multi.c:#include "hw/char/serial.h"
  hw/char/serial.c:#include "hw/char/serial.h"
  hw/char/serial-isa.c:#include "hw/char/serial.h"
  hw/char/serial-pci.c:#include "hw/char/serial.h"

Tested-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Link: https://lore.kernel.org/r/20240905073832.16222-4-shentey@gmail.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/ppc/Kconfig

@@ -51,7 +51,7 @@ config PPC405
     select M48T59
     select PFLASH_CFI02
     select PPC4XX
-    select SERIAL
+    select SERIAL_MM
 
 config PPC440
     bool
@@ -63,7 +63,7 @@ config PPC440
     select PCI_EXPRESS
     select PPC440_PCIX
     select PPC4XX
-    select SERIAL
+    select SERIAL_MM
     select FDT_PPC
 
 config PPC4XX
@@ -80,7 +80,7 @@ config SAM460EX
     select IDE_SII3112
     select M41T80
     select PPC440
-    select SERIAL
+    select SERIAL_MM
     select SM501
     select SMBUS_EEPROM
     select USB_EHCI_SYSBUS
@@ -163,7 +163,7 @@ config E500
     select PLATFORM_BUS
     select PPCE500_PCI
     select SDHCI
-    select SERIAL
+    select SERIAL_MM
     select MPC_I2C
     select FDT_PPC
     select DS1338
@@ -187,7 +187,7 @@ config VIRTEX
     depends on PPC && FDT
     select PPC4XX
     select PFLASH_CFI01
-    select SERIAL
+    select SERIAL_MM
     select XILINX
     select XILINX_ETHLITE
     select FDT_PPC

hw/ppc/e500.c

@@ -24,7 +24,7 @@
 #include "net/net.h"
 #include "qemu/config-file.h"
 #include "hw/block/flash.h"
-#include "hw/char/serial.h"
+#include "hw/char/serial-mm.h"
 #include "hw/pci/pci.h"
 #include "sysemu/block-backend-io.h"
 #include "sysemu/sysemu.h"

hw/ppc/ppc405_uc.c

@@ -32,7 +32,7 @@
 #include "hw/irq.h"
 #include "hw/qdev-properties.h"
 #include "ppc405.h"
-#include "hw/char/serial.h"
+#include "hw/char/serial-mm.h"
 #include "qemu/timer.h"
 #include "sysemu/reset.h"
 #include "sysemu/sysemu.h"

hw/ppc/ppc440_bamboo.c

@@ -23,7 +23,7 @@
 #include "sysemu/device_tree.h"
 #include "hw/loader.h"
 #include "elf.h"
-#include "hw/char/serial.h"
+#include "hw/char/serial-mm.h"
 #include "hw/ppc/ppc.h"
 #include "hw/pci-host/ppc4xx.h"
 #include "sysemu/sysemu.h"

hw/ppc/sam460ex.c

@@ -31,7 +31,7 @@
 #include "sysemu/sysemu.h"
 #include "sysemu/reset.h"
 #include "hw/sysbus.h"
-#include "hw/char/serial.h"
+#include "hw/char/serial-mm.h"
 #include "hw/i2c/ppc4xx_i2c.h"
 #include "hw/i2c/smbus_eeprom.h"
 #include "hw/ide/pci.h"

hw/ppc/virtex_ml507.c

@@ -28,7 +28,7 @@
 #include "exec/page-protection.h"
 #include "cpu.h"
 #include "hw/sysbus.h"
-#include "hw/char/serial.h"
+#include "hw/char/serial-mm.h"
 #include "hw/block/flash.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/reset.h"