ARM: kirkwood: enable CONFIG_DM_USB on db-88f6281-bp

Switch to the driver model for USB on the db-88f6281-bp board.
CONFIG_BLK can't be enabled yet because mvebu_mmc.c needs converting.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/configs/db-88f6281-bp-nand_defconfig b/configs/db-88f6281-bp-nand_defconfig
index 6360ef5..a7a65df 100644
--- a/configs/db-88f6281-bp-nand_defconfig
+++ b/configs/db-88f6281-bp-nand_defconfig
@@ -47,6 +47,7 @@
 CONFIG_SPI=y
 CONFIG_KIRKWOOD_SPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
 CONFIG_LZMA=y
diff --git a/configs/db-88f6281-bp-spi_defconfig b/configs/db-88f6281-bp-spi_defconfig
index 54d4767..bafbdd3 100644
--- a/configs/db-88f6281-bp-spi_defconfig
+++ b/configs/db-88f6281-bp-spi_defconfig
@@ -49,6 +49,7 @@
 CONFIG_DM_SPI=y
 CONFIG_KIRKWOOD_SPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
 CONFIG_LZMA=y