SWDEV-465041 - Enable direct dispatch under Linux by default.

 (#1934)
[rocm-systems] ROCm/rocm-systems#1934 (commit 2c57548)

Author: gandryey

rocclr/utils/flags.hpp

@@ -179,7 +179,7 @@ release(uint, HIP_HOST_COHERENT, 0,                                           \
 release(uint, AMD_OPT_FLUSH, 1,                                               \
         "Kernel flush option , 0x0 = Use system-scope fence operations."      \
         "0x1 = Use device-scope fence operations when possible.")             \
-release(bool, AMD_DIRECT_DISPATCH, false,                                     \
+release(bool, AMD_DIRECT_DISPATCH, IS_LINUX,                                  \
         "Enable direct kernel dispatch.")                                     \
 release(uint, HIP_HIDDEN_FREE_MEM, 0,                                         \
         "Reserve free mem reporting in Mb"                                    \