nir: replace IS_SWIZZLED flag with ACCESS_IS_SWIZZLED_AMD

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19422>

src/compiler/shader_enums.h

@@ -1000,6 +1000,13 @@ enum gl_access_qualifier
 
    /** Execute instruction also in helpers. */
    ACCESS_INCLUDE_HELPERS = (1 << 8),
+
+   /**
+    * Whether the address bits are swizzled by the hw. This practically means
+    * that loads can't be vectorized and must be exactly 32 bits on some chips.
+    * The swizzle amount is determined by the descriptor.
+    */
+   ACCESS_IS_SWIZZLED_AMD = (1 << 9),
 };
 
 /**