thunderbolt: Drop duplicate NULL checks around nvmem_unregister()

Since nvmem_unregister() checks for NULL, no need to repeat in
the caller. Drop duplicate NULL checks.
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220220151527.17216-14-srinivas.kandagatla@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/thunderbolt/nvm.c

@@ -154,10 +154,8 @@ int tb_nvm_add_non_active(struct tb_nvm *nvm, size_t size,
 void tb_nvm_free(struct tb_nvm *nvm)
 {
 	if (nvm) {
-		if (nvm->non_active)
-			nvmem_unregister(nvm->non_active);
-		if (nvm->active)
-			nvmem_unregister(nvm->active);
+		nvmem_unregister(nvm->non_active);
+		nvmem_unregister(nvm->active);
 		vfree(nvm->buf);
 		ida_simple_remove(&nvm_ida, nvm->id);
 	}