Revert "gsdx state: TEX0 write behavior might depends on the context"

This reverts commit b34243f.

Unfortunately we have a regression on GT4. I'm doomed

plugins/GSdx/GSState.cpp

@@ -821,8 +821,7 @@ void GSState::GIFRegHandlerXYZ2(const GIFReg* RESTRICT r)
 
 template<int i> void GSState::ApplyTEX0(GIFRegTEX0& TEX0)
 {
-	// Mask invalid bit before any comparison
-	TEX0.CPSM &= 0xa; // 1010b
+	// even if TEX0 did not change, a new palette may have been uploaded and will overwrite the currently queued for drawing
 
 	// Handle invalid PSM here
 	switch (TEX0.PSM) {
@@ -848,20 +847,6 @@ template<int i> void GSState::ApplyTEX0(GIFRegTEX0& TEX0)
 			break;
 	}
 
-	if (PRIM->CTXT != i) {
-		// Context isn't current. Only update the register value.
-		// Handling (real write of the clut buffer) will be done when ctxt will be switched
-		if((TEX0.u32[0] ^ m_env.CTXT[i].TEX0.u32[0]) & 0x3ffffff) // TBP0 TBW PSM
-		{
-			m_env.CTXT[i].offset.tex = m_mem.GetOffset(TEX0.TBP0, TEX0.TBW, TEX0.PSM);
-		}
-
-		m_env.CTXT[i].TEX0 = (GSVector4i)TEX0;
-		return;
-	}
-
-	// even if TEX0 did not change, a new palette may have been uploaded and will overwrite the currently queued for drawing
-
 	bool wt = m_mem.m_clut.WriteTest(TEX0, m_env.TEXCLUT);
 
 	// clut loading already covered with WriteTest, for drawing only have to check CPSM and CSA (MGS3 intro skybox would be drawn piece by piece without this)
@@ -873,6 +858,7 @@ template<int i> void GSState::ApplyTEX0(GIFRegTEX0& TEX0)
 		Flush();
 	}
 
+	TEX0.CPSM &= 0xa; // 1010b
 
 	if((TEX0.u32[0] ^ m_env.CTXT[i].TEX0.u32[0]) & 0x3ffffff) // TBP0 TBW PSM
 	{
@@ -2446,21 +2432,9 @@ void GSState::SetGameCRC(uint32 crc, int options)
 
 void GSState::UpdateContext()
 {
-	bool context_switch = (m_context != &m_env.CTXT[PRIM->CTXT]);
-
 	m_context = &m_env.CTXT[PRIM->CTXT];
 
 	UpdateScissor();
-
-	if (context_switch) {
-		// Harley davidson sets TEX0 register before the context. Re-apply it now
-		// so clut is properly loaded
-		if (m_context == &m_env.CTXT[1]) {
-			ApplyTEX0<1>(m_env.CTXT[PRIM->CTXT].TEX0);
-		} else {
-			ApplyTEX0<0>(m_env.CTXT[PRIM->CTXT].TEX0);
-		}
-	}
 }
 
 void GSState::UpdateScissor()