mmc: sdhci-of-aspeed: test: Fix dependencies when KUNIT=m

While the sdhci-of-aspeed KUnit tests do work when builtin, and do work
when KUnit itself is being built as a module, the two together break.

This is because the KUnit tests (understandably) depend on KUnit, so a
built-in test cannot build if KUnit is a module.

Fix this by adding a dependency on (MMC_SDHCI_OF_ASPEED=m || KUNIT=y),
which only excludes this one problematic configuration.

This was reported on a nasty openrisc-randconfig run by the kernel test
robot, though for some reason (compiler optimisations removing the test
code?) I wasn't able to reproduce it locally on x86:
https://lore.kernel.org/linux-mm/[email protected]/T/

Fixes: 291cd54 ("mmc: sdhci-of-aspeed: test: Use kunit_test_suite() macro")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: David Gow <[email protected]>
Acked-by: Andrew Jeffery <[email protected]>
Acked-by: Ulf Hansson <[email protected]>
Acked-by: Brendan Higgins <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

drivers/mmc/host/Kconfig

@@ -171,6 +171,7 @@ config MMC_SDHCI_OF_ASPEED
 config MMC_SDHCI_OF_ASPEED_TEST
 	bool "Tests for the ASPEED SDHCI driver" if !KUNIT_ALL_TESTS
 	depends on MMC_SDHCI_OF_ASPEED && KUNIT
+	depends on (MMC_SDHCI_OF_ASPEED=m || KUNIT=y)
 	default KUNIT_ALL_TESTS
 	help
 	  Enable KUnit tests for the ASPEED SDHCI driver. Select this