LOCAL / ARM: defconfig: Fix boot hang on Trats2 around DRM

LOCAL / ARM: defconfig: Fix boot hang on Trats2 around DRM

Disabling framebuffer console fixes boot hang on Trats2 board after:
[    1.136523] [drm] Initialized drm 1.1.0 20060810
[    1.143789] exynos-drm exynos-drm: bound 11c00000.fimd (ops fimd_component_ops)
[    1.149944] exynos-drm exynos-drm: bound 11c80000.dsi (ops exynos_dsi_component_ops)
[    1.157366] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.163954] [drm] No driver support for vblank timestamp query.
[    1.169893] [drm] Initialized exynos 1.0.0 20110530 on minor 0

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>