Kconfig: Rework MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG

* Rename it to HAVE_VGA_TEXT_FRAMEBUFFER.
* Let drivers select it if they are in charge.
* Don't select it on the mainboard level if a driver handles it.

Change-Id: I2d9d09be9aa6d019e77460e69a245ad2d8cda4ea
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/19791
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/drivers/emulation/qemu/Kconfig

@@ -3,6 +3,7 @@ config DRIVERS_EMULATION_QEMU_BOCHS
 	default y
 	depends on BOARD_EMULATION_QEMU_X86
 	depends on MAINBOARD_DO_NATIVE_VGA_INIT
+	select HAVE_VGA_TEXT_FRAMEBUFFER
 	select VGA
 	help
 	   VGA driver for qemu emulated vga cards supporting