VideoCommon: Refactor TexMode0 mipmaps disabled test into a helper function

Source/Core/VideoCommon/SamplerCommon.h

@@ -4,6 +4,9 @@
 
 #pragma once
 
+namespace SamplerCommon
+{
+
 // Helper for checking if a BPMemory TexMode0 register is set to Point
 // Filtering modes. This is used to decide whether Anisotropic enhancements
 // are (mostly) safe in the VideoBackends.
@@ -16,3 +19,12 @@ constexpr bool IsBpTexMode0PointFiltering(const T& tm0)
 {
 	return tm0.min_filter < 4 && !tm0.mag_filter;
 }
+
+// Check if the minification filter has mipmap based filtering modes enabled.
+template<class T>
+constexpr bool AreBpTexMode0MipmapsEnabled(const T& tm0)
+{
+	return (tm0.min_filter & 3) != 0;
+}
+
+}

Source/Core/VideoCommon/TextureCacheBase.cpp

@@ -26,6 +26,7 @@
 #include "VideoCommon/FramebufferManagerBase.h"
 #include "VideoCommon/HiresTextures.h"
 #include "VideoCommon/RenderBase.h"
+#include "VideoCommon/SamplerCommon.h"
 #include "VideoCommon/Statistics.h"
 #include "VideoCommon/TextureCacheBase.h"
 #include "VideoCommon/TextureDecoder.h"
@@ -440,7 +441,7 @@ TextureCacheBase::TCacheEntryBase* TextureCacheBase::Load(const u32 stage)
 	const int texformat = tex.texImage0[id].format;
 	const u32 tlutaddr = tex.texTlut[id].tmem_offset << 9;
 	const u32 tlutfmt = tex.texTlut[id].tlut_format;
-	const bool use_mipmaps = (tex.texMode0[id].min_filter & 3) != 0;
+	const bool use_mipmaps = SamplerCommon::AreBpTexMode0MipmapsEnabled(tex.texMode0[id]);
 	u32 tex_levels = use_mipmaps ? ((tex.texMode1[id].max_lod + 0xf) / 0x10 + 1) : 1;
 	const bool from_tmem = tex.texImage1[id].image_type != 0;