treewide: Replace BOARD_EMULATION_QEMU_X86

It is equivalent to the CPU_QEMU_X86 symbol.

Change-Id: Ic16233e3d80bab62cc97fd075bdcca1780a6a2b5
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39182
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/console/Kconfig

@@ -280,7 +280,7 @@ config CONSOLE_SPI_FLASH_BUFFER_SIZE
 
 config CONSOLE_QEMU_DEBUGCON
 	bool "QEMU debug console output"
-	depends on BOARD_EMULATION_QEMU_X86
+	depends on CPU_QEMU_X86
 	default y
 	help
 	  Send coreboot debug output to QEMU's isa-debugcon device:

src/device/pci_rom.c

@@ -59,7 +59,7 @@ struct rom_header *pci_rom_probe(struct device *dev)
 		rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
 
 		if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
-#if CONFIG(BOARD_EMULATION_QEMU_X86)
+#if CONFIG(CPU_QEMU_X86)
 			if ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
 				rom_address = 0xc0000;
 			else

src/drivers/emulation/qemu/Kconfig

@@ -1,7 +1,7 @@
 config DRIVERS_EMULATION_QEMU_BOCHS
 	bool "bochs dispi interface vga driver"
 	default y
-	depends on BOARD_EMULATION_QEMU_X86
+	depends on CPU_QEMU_X86
 	depends on MAINBOARD_DO_NATIVE_VGA_INIT
 	select HAVE_VGA_TEXT_FRAMEBUFFER
 	select HAVE_LINEAR_FRAMEBUFFER

src/mainboard/emulation/Kconfig

@@ -8,11 +8,6 @@ source "src/mainboard/emulation/*/Kconfig.name"
 
 endchoice
 
-config BOARD_EMULATION_QEMU_X86
-	bool
-	default y
-	depends on CPU_QEMU_X86
-
 source "src/mainboard/emulation/*/Kconfig"
 
 config MAINBOARD_VENDOR