Add Radeon gfx940-942 GPU support

llm/generate/gen_linux.sh

@@ -26,6 +26,9 @@ amdGPUs() {
         "gfx908:xnack-"
         "gfx90a:xnack+"
         "gfx90a:xnack-"
+        "gfx940"
+        "gfx941"
+        "gfx942"
         "gfx1010"
         "gfx1012"
         "gfx1030"

llm/generate/gen_windows.ps1

@@ -13,6 +13,9 @@ function amdGPUs {
         "gfx908:xnack-"
         "gfx90a:xnack+"
         "gfx90a:xnack-"
+        "gfx940"
+        "gfx941"
+        "gfx942"
         "gfx1010"
         "gfx1012"
         "gfx1030"