mmc: sdhci-of-aspeed: Add dependency on ARCH_ASPEED

The MMC_SDHCI_OF_ASPEED is part of the Aspeed silicon so it makes
sense to depend on ARCH_ASPEED and for compile testing.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://lore.kernel.org/r/20220916115602.370003-1-pbrobinson@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/Kconfig

@@ -157,6 +157,7 @@ config MMC_SDHCI_OF_ARASAN
 
 config MMC_SDHCI_OF_ASPEED
 	tristate "SDHCI OF support for the ASPEED SDHCI controller"
+	depends on ARCH_ASPEED || COMPILE_TEST
 	depends on MMC_SDHCI_PLTFM
 	depends on OF && OF_ADDRESS
 	select MMC_SDHCI_IO_ACCESSORS