arm64: defconfig: Enable the EFI Framebuffer

Tested on the Lenovo Yoga C630 where this patch enables the
framebuffer (screen/monitor).  Without it the device appears
not to boot.

Link: https://lore.kernel.org/r/20190903192625.14775-2-lee.jones@linaro.orgSigned-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/configs/defconfig

@@ -551,6 +551,7 @@ CONFIG_DRM_LIMA=m
 CONFIG_DRM_PANFROST=m
 CONFIG_FB=y
 CONFIG_FB_MODE_HELPERS=y
+CONFIG_FB_EFI=y
 CONFIG_BACKLIGHT_GENERIC=m
 CONFIG_BACKLIGHT_PWM=m
 CONFIG_BACKLIGHT_LP855X=m