mtd: onenand: Enable compile testing of OMAP and Samsung drivers

OMAP and Samsung OneNAND drivers can be compile tested.  The OMAP
drivers still depends on mach header so limit the compile testing to
ARMv7.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/onenand/Kconfig

@@ -25,7 +25,7 @@ config MTD_ONENAND_GENERIC
 
 config MTD_ONENAND_OMAP2
 	tristate "OneNAND on OMAP2/OMAP3 support"
-	depends on ARCH_OMAP2 || ARCH_OMAP3
+	depends on ARCH_OMAP2 || ARCH_OMAP3 || (COMPILE_TEST && ARM)
 	depends on OF || COMPILE_TEST
 	help
 	  Support for a OneNAND flash device connected to an OMAP2/OMAP3 SoC
@@ -34,7 +34,7 @@ config MTD_ONENAND_OMAP2
 
 config MTD_ONENAND_SAMSUNG
 	tristate "OneNAND on Samsung SOC controller support"
-	depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4
+	depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4 || COMPILE_TEST
 	help
 	  Support for a OneNAND flash device connected to an Samsung SOC.
 	  S3C64XX uses command mapping method.