Fixed shadows on OpenGL

ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipeline.cs

             float atlasWidth = (float)m_ShadowSettings.shadowAtlasWidth;
             float atlasHeight = (float)m_ShadowSettings.shadowAtlasHeight;
 
-            float deviceZRangeScale = 1.0f;
-
             // Currently CullResults ComputeDirectionalShadowMatricesAndCullingPrimitives doesn't
             // apply z reversal to projection matrix. We need to do it manually here.
             if (SystemInfo.usesReversedZBuffer)
                 proj.m22 = -proj.m22;
                 proj.m23 = -proj.m23;
-                deviceZRangeScale = 0.5f;
             }
 
             Matrix4x4 worldToShadow = proj * view;
             textureScaleAndBias.m11 = 0.5f;
-            textureScaleAndBias.m22 = deviceZRangeScale;
+            textureScaleAndBias.m22 = 0.5f;
-            textureScaleAndBias.m23 = deviceZRangeScale;
+            textureScaleAndBias.m23 = 0.5f;
             textureScaleAndBias.m13 = 0.5f;
 
             // Apply texture scale and offset to save a MAD in shader.

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightPassShadow.hlsl

     clipPos.z += _ShadowBias.x;
 
 #if defined(UNITY_REVERSED_Z)
-    clipPos.z = min(clipPos.z, UNITY_NEAR_CLIP_VALUE);
+    clipPos.z = min(clipPos.z, 1.0);
-    clipPos.z = max(clipPos.z, UNITY_NEAR_CLIP_VALUE);
+    clipPos.z = max(clipPos.z, 0.0);
 #endif
     return clipPos;
 }