treewide: Move CONFIG_PHY_MARVELL to Kconfig

The CONFIG_PHY_MARVELL has already been migrated to Kconfig (some boards
already had it in their Kconfig), but had not been moved for older
boards.

Move it to the defconfigs for all boards.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/vme8349_defconfig b/configs/vme8349_defconfig
index df5cd19..f4fff9c 100644
--- a/configs/vme8349_defconfig
+++ b/configs/vme8349_defconfig
@@ -16,6 +16,7 @@
 CONFIG_CMD_DATE=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_PHY_MARVELL=y
 CONFIG_NETDEVICES=y
 CONFIG_TSEC_ENET=y
 CONFIG_BAUDRATE=9600