bus: qcom_ebi2: default y if ARCH_QCOM

Since we want this external bus to be available on multi_v7 builds,
set to default ARCH_QCOM so we get it selected whenever QCOM is
enabled.
Suggested-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>

drivers/bus/Kconfig

@@ -112,6 +112,7 @@ config QCOM_EBI2
 	bool "Qualcomm External Bus Interface 2 (EBI2)"
 	depends on HAS_IOMEM
 	depends on ARCH_QCOM || COMPILE_TEST
+	default ARCH_QCOM
 	help
 	  Say y here to enable support for the Qualcomm External Bus
 	  Interface 2, which can be used to connect things like NAND Flash,