Revert "performance: disable cpu caching for buffers on PTL"

This reverts commit c3f0c4e4ac.

Signed-off-by: Tomasz Biernacik <tomasz.biernacik@intel.com>

shared/source/xe3_core/ptl/os_agnostic_product_helper_ptl.inl

@@ -34,9 +34,4 @@ bool ProductHelperHw<gfxProduct>::isDirectSubmissionSupported(ReleaseHelper *rel
     return true;
 }
 
-template <>
-bool ProductHelperHw<gfxProduct>::isCachingOnCpuAvailable() const {
-    return false;
-}
-
 } // namespace NEO

shared/test/unit_test/xe3_core/ptl/product_helper_tests_ptl.cpp

@@ -89,7 +89,3 @@ PTLTEST_F(PtlProductHelper, givenExternalHostPtrWhenMitigateDcFlushThenOverrideC
         }
     }
 }
-
-PTLTEST_F(PtlProductHelper, givenProductHelperWhenCallIsCachingOnCpuAvailableThenFalseIsReturned) {
-    EXPECT_FALSE(productHelper->isCachingOnCpuAvailable());
-}