Otherwise we have to disable it manually to avoid compile errors.

Now it's only enabled only for the selected machines as suggested
by Anton Vorontsov <cbouatmailru@gmail.com>:

$ git grep VGA_CONSOLE= arch/arm/configs/
arch/arm/configs/footbridge_defconfig:CONFIG_VGA_CONSOLE=y
arch/arm/configs/integrator_defconfig:CONFIG_VGA_CONSOLE=y
arch/arm/configs/netwinder_defconfig:CONFIG_VGA_CONSOLE=y

Note that the Kconfig entry no longer needs separate entries
for ARCH_ACORN, ARCH_EBSA110 ARCH_VERSATILE.

Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Tony Lindgren <tony@atomide.com>