[PATCH] ath10k: replace config_enabled() with IS_REACHABLE()

Commit 97f2645f358b ("tree-wide: replace config_enabled() with IS_ENABLED()") mostly did away with config_enabled(). This is one of the postponed TODO items as config_enabled() is used for a tristate option here. Theoretically, config_enabled() is equivalent to IS_BUILTIN(), but I guess

[PATCH] ath10k: replace config_enabled() with IS_REACHABLE()

Commit 97f2645f358b ("tree-wide: replace config_enabled() with IS_ENABLED()") mostly did away with config_enabled(). This is one of the postponed TODO items as config_enabled() is used for a tristate option here. Theoretically, config_enabled() is equivalent to IS_BUILTIN(), but I guess