6.1-stable patches

added patches:
	drm-i915-gem-zero-initialize-the-eb.vma-array-in-i915_gem_do_execbuffer.patch
	drm-mediatek-fix-device-node-reference-leak-in-mtk_dp_dt_parse.patch
	drm-mgag200-fix-big-endian-support.patch
	drm-msm-a6xx-fix-out-of-bound-io-access-in-a6xx_get_gmu_registers.patch
	drm-nouveau-dispnv50-don-t-call-drm_atomic_get_crtc_state-in-prepare_fb.patch
	drm-ttm-avoid-null-pointer-deref-for-evicted-bos.patch