rocr: Fix ISA generic's for gfx906 wrt sramecc

gfx9-generic cannot support sramecc- and sramecc+.
sramecc feature is only configurable on gfx906.

The code object produced for gfx9-generic can be loaded on both
gfx906 with any sramecc setting, compiler will produce the isa
that will correctly work on both (EF_AMDGPU_FEATURE_SRAMECC_ANY_V4).


[ROCm/ROCR-Runtime commit: b7361c5ee4]

projects/rocr-runtime/runtime/hsa-runtime/core/runtime/isa.cpp

@@ -259,12 +259,6 @@ IsaRegistry::GetSupportedGenericVersions() {
     {prepend_isa_prefix("gfx9-generic"), 1},
     {prepend_isa_prefix("gfx9-generic:xnack-"), 1},
     {prepend_isa_prefix("gfx9-generic:xnack+"), 1},
-    {prepend_isa_prefix("gfx9-generic:sramecc-"), 1},
-    {prepend_isa_prefix("gfx9-generic:sramecc+"), 1},
-    {prepend_isa_prefix("gfx9-generic:sramecc-:xnack-"), 1},
-    {prepend_isa_prefix("gfx9-generic:sramecc+:xnack+"), 1},
-    {prepend_isa_prefix("gfx9-generic:sramecc-:xnack-"), 1},
-    {prepend_isa_prefix("gfx9-generic:sramecc+:xnack+"), 1},
     {prepend_isa_prefix("gfx9-4-generic"), 1},
     {prepend_isa_prefix("gfx9-4-generic:xnack-"), 1},
     {prepend_isa_prefix("gfx9-4-generic:xnack+"), 1},