configs: blackfin: move CONFIG_USB to defconfig

These Blackfin boards are the last ones that define CONFIG_USB in
their headers.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

configs/bf526-ezbrd_defconfig

@@ -17,3 +17,4 @@ CONFIG_CMD_FAT=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_SST=y
+CONFIG_USB=y

configs/bf527-ezkit-v2_defconfig

@@ -17,4 +17,5 @@ CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_USB=y
 CONFIG_LIB_RAND=y

configs/bf527-ezkit_defconfig

@@ -17,3 +17,4 @@ CONFIG_NET_RANDOM_ETHADDR=y
 # CONFIG_NET_TFTP_VARS is not set
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_USB=y

configs/bf548-ezkit_defconfig

@@ -16,5 +16,6 @@ CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_USB=y
 CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y
 CONFIG_LIB_RAND=y

include/configs/bf526-ezbrd.h

@@ -125,7 +125,6 @@
  * USB Settings
  */
 #if !defined(__ADSPBF522__) && !defined(__ADSPBF523__)
-#define CONFIG_USB
 #define CONFIG_USB_MUSB_HCD
 #define CONFIG_USB_BLACKFIN
 #define CONFIG_USB_STORAGE

include/configs/bf527-ezkit.h

@@ -128,7 +128,6 @@
  * USB Settings
  */
 #if !defined(__ADSPBF522__) && !defined(__ADSPBF523__)
-#define CONFIG_USB
 #define CONFIG_USB_MUSB_HCD
 #define CONFIG_USB_BLACKFIN
 #define CONFIG_USB_STORAGE

include/configs/bf548-ezkit.h

@@ -151,7 +151,6 @@
  * USB Settings
  */
 #if !defined(__ADSPBF544__)
-#define CONFIG_USB
 #define CONFIG_USB_MUSB_HCD
 #define CONFIG_USB_BLACKFIN
 #define CONFIG_USB_STORAGE