drm/exynos: exynos_drm_ipp: Remove redundant break statement

'break' after goto statement is redundant. Silences the following
message:
drivers/gpu/drm/exynos/exynos_drm_ipp.c:1067 exynos_drm_ipp_check_valid()
info: ignoring unreachable code.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>