usb: CONFIG_USB_FASTBOOT prefix replacement for consistency

FASTBOOT is defined both by CONFIG_USB_FUNCTION_FASTBOOT AND CONFIG_CMD_FASTBOOT, so it doesn't
make much sense to have a CONFIG_USB_FASTBOOT prefix for fastboot-specific options, especially
given that other config options for fastboot use the CONFIG_FASTBOOT prefix.

This replaces the CONFIG_USB_FASTBOOT prefix with CONFIG_FASTBOOT, for consistency.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index abcdfda..633391b 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -301,8 +301,8 @@
 #define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
-#define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
-#define CONFIG_USB_FASTBOOT_BUF_SIZE	0x07000000
+#define CONFIG_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
+#define CONFIG_FASTBOOT_BUF_SIZE	0x07000000
 
 /* To support eMMC booting */
 #define CONFIG_STORAGE_EMMC
diff --git a/include/configs/bav335x.h b/include/configs/bav335x.h
index 31b75f2..fa32fa4 100644
--- a/include/configs/bav335x.h
+++ b/include/configs/bav335x.h
@@ -458,8 +458,8 @@
 #define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
-#define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
-#define CONFIG_USB_FASTBOOT_BUF_SIZE	0x07000000
+#define CONFIG_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
+#define CONFIG_FASTBOOT_BUF_SIZE	0x07000000
 
 /* To support eMMC booting */
 #define CONFIG_STORAGE_EMMC
diff --git a/include/configs/bcm28155_ap.h b/include/configs/bcm28155_ap.h
index 97e1508..b7c5716 100644
--- a/include/configs/bcm28155_ap.h
+++ b/include/configs/bcm28155_ap.h
@@ -140,8 +140,8 @@
 #define CONFIG_FASTBOOT_FLASH
 #define CONFIG_FASTBOOT_FLASH_MMC_DEV	0
 #define CONFIG_SYS_CACHELINE_SIZE	64
-#define CONFIG_USB_FASTBOOT_BUF_SIZE	(CONFIG_SYS_SDRAM_SIZE - SZ_1M)
-#define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_SDRAM_BASE
+#define CONFIG_FASTBOOT_BUF_SIZE	(CONFIG_SYS_SDRAM_SIZE - SZ_1M)
+#define CONFIG_FASTBOOT_BUF_ADDR	CONFIG_SYS_SDRAM_BASE
 #define CONFIG_USB_GADGET
 #define CONFIG_USB_GADGET_DUALSPEED
 #define CONFIG_USB_GADGET_VBUS_DRAW	0
diff --git a/include/configs/dra7xx_evm.h b/include/configs/dra7xx_evm.h
index 62330bf..7499447 100644
--- a/include/configs/dra7xx_evm.h
+++ b/include/configs/dra7xx_evm.h
@@ -92,8 +92,8 @@
 #define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
-#define CONFIG_USB_FASTBOOT_BUF_ADDR    CONFIG_SYS_LOAD_ADDR
-#define CONFIG_USB_FASTBOOT_BUF_SIZE    0x2F000000
+#define CONFIG_FASTBOOT_BUF_ADDR    CONFIG_SYS_LOAD_ADDR
+#define CONFIG_FASTBOOT_BUF_SIZE    0x2F000000
 #define CONFIG_FASTBOOT_FLASH
 #define CONFIG_FASTBOOT_FLASH_MMC_DEV   1
 #endif
diff --git a/include/configs/nitrogen6x.h b/include/configs/nitrogen6x.h
index 47239b1..3bb2e8f 100644
--- a/include/configs/nitrogen6x.h
+++ b/include/configs/nitrogen6x.h
@@ -349,7 +349,7 @@
 #define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
-#define CONFIG_USB_FASTBOOT_BUF_ADDR   CONFIG_SYS_LOAD_ADDR
-#define CONFIG_USB_FASTBOOT_BUF_SIZE   0x07000000
+#define CONFIG_FASTBOOT_BUF_ADDR   CONFIG_SYS_LOAD_ADDR
+#define CONFIG_FASTBOOT_BUF_SIZE   0x07000000
 
 #endif	       /* __CONFIG_H */
diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index 59c780e..804e307 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -75,8 +75,8 @@
 #define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
-#define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
-#define CONFIG_USB_FASTBOOT_BUF_SIZE	0x07000000
+#define CONFIG_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
+#define CONFIG_FASTBOOT_BUF_SIZE	0x07000000
 
 /* USB EHCI */
 #define CONFIG_CMD_USB