Remove saturate function define in GLSL since we use clamp everywhere…

… instead. Change the function defines over to just regular defines since Qualcomm can't handle function defines at all it seems.

Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp

@@ -524,9 +524,8 @@ void ProgramShaderCache::CreateHeader ( void )
 		"#define float4 vec4\n"
 
 		// hlsl to glsl function translation
-		"#define frac(x) fract(x)\n"
-		"#define saturate(x) clamp(x, 0.0f, 1.0f)\n"
-		"#define lerp(x, y, z) mix(x, y, z)\n"
+		"#define frac fract\n"
+		"#define lerp mix\n"
 
 		// glsl 120 hack
 		"%s\n"