ARM: exynos_defconfig: Remove old non-working MIPI driver

The Exynos MIPI driver does not work anymore (it is board file only) so
it is removed.  Remove also config options.

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Donghwa Lee <dh09.lee@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

arch/arm/configs/exynos_defconfig

@@ -165,8 +165,6 @@ CONFIG_DRM_PANEL_SAMSUNG_LD9040=y
 CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0=y
 CONFIG_DRM_NXP_PTN3460=y
 CONFIG_DRM_PARADE_PS8622=y
-CONFIG_EXYNOS_VIDEO=y
-CONFIG_EXYNOS_MIPI_DSI=y
 CONFIG_LCD_CLASS_DEVICE=y
 CONFIG_LCD_PLATFORM=y
 CONFIG_BACKLIGHT_PWM=y