phy: marvell: Do not enable by default during compile testing

Enabling the compile test should not cause automatic enabling of all
drivers.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/marvell/Kconfig

···
 	depends on ARCH_MVEBU || COMPILE_TEST
 	depends on OF
 	depends on HAVE_ARM_SMCCC
-	default y
+	default ARCH_MVEBU
 	select GENERIC_PHY
 	help
 	  This driver allows to control the comphy, a hardware block providing
···
 	tristate "Marvell A3700 UTMI driver"
 	depends on ARCH_MVEBU || COMPILE_TEST
 	depends on OF
-	default y
+	default ARCH_MVEBU
 	select GENERIC_PHY
 	help
 	  Enable this to support Marvell A3700 UTMI PHY driver.