shader_ir: Unify constant buffer offset values

Constant buffer values on the shader IR were using different offsets if
the access direct or indirect. cbuf34 has a non-multiplied offset while
cbuf36 does. On shader decoding this commit multiplies it by four on
cbuf34 queries.

src/video_core/shader/shader_ir.h

@@ -249,7 +249,7 @@ public:
     }
 
     u32 GetSize() const {
-        return max_offset + 1;
+        return max_offset + sizeof(float);
     }
 
 private: