drm/i915/gvt: drop checks for early Skylake revisions

We no longer cater for pre-production revisions of Skylake.

Fixes: d4362225e8cb ("drm/i915/gvt: update misc ctl regs base on stepping info")
Cc: Ping Gao <ping.a.gao@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: <intel-gfx@lists.freedesktop.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

drivers/gpu/drm/i915/gvt/handlers.c

@@ -1279,14 +1279,12 @@ static int skl_misc_ctl_write(struct intel_vgpu *vgpu, unsigned int offset,
 	case 0x4ddc:
 		vgpu_vreg(vgpu, offset) = 0x8000003c;
 		/* WaCompressedResourceSamplerPbeMediaNewHashMode:skl */
-		if (IS_SKL_REVID(dev_priv, SKL_REVID_C0, REVID_FOREVER))
-			I915_WRITE(reg, vgpu_vreg(vgpu, offset));
+		I915_WRITE(reg, vgpu_vreg(vgpu, offset));
 		break;
 	case 0x42080:
 		vgpu_vreg(vgpu, offset) = 0x8000;
 		/* WaCompressedResourceDisplayNewHashMode:skl */
-		if (IS_SKL_REVID(dev_priv, SKL_REVID_E0, REVID_FOREVER))
-			I915_WRITE(reg, vgpu_vreg(vgpu, offset));
+		I915_WRITE(reg, vgpu_vreg(vgpu, offset));
 		break;
 	default:
 		return -EINVAL;