ARM: configs: at91: enable CONFIG_DRM_FBDEV_EMULATION

Enable CONFIG_DRM_FBDEV_EMULATION to ensure proper functioning of KMS sink
by enabling the drm_fb_helper drivers.

CONFIG_DRM_FBDEV_EMULATION selects the CONFIG_FRAMEBUFFER_CONSOLE which we
don't require, hence disable it.

Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>

Author: Dharma Balasubiramani

arch/arm/configs/at91_dt_defconfig

@@ -201,6 +201,7 @@ CONFIG_VIDEO_MT9V032=m
 CONFIG_VIDEO_OV2640=m
 CONFIG_VIDEO_OV7740=m
 CONFIG_DRM=y
+CONFIG_DRM_FBDEV_EMULATION=y
 CONFIG_DRM_ATMEL_HLCDC=y
 CONFIG_DRM_MICROCHIP_DW_MIPI_DSI=y
 CONFIG_DRM_PANEL_SIMPLE=y
@@ -210,6 +211,7 @@ CONFIG_FB_ATMEL=y
 CONFIG_BACKLIGHT_ATMEL_LCDC=y
 CONFIG_BACKLIGHT_PWM=y
 CONFIG_BACKLIGHT_CLASS_DEVICE=y
+# CONFIG_FRAMEBUFFER_CONSOLE is not set
 CONFIG_SOUND=y
 CONFIG_SND=y
 CONFIG_SND_USB_AUDIO=y