global: Migrate CONFIG_DFU_ALT et al to CFG

Perform simple renames of:
   CONFIG_DFU_ALT to CFG_DFU_ALT
   CONFIG_DFU_ALT_BOOT_EMMC to CFG_DFU_ALT_BOOT_EMMC
   CONFIG_DFU_ALT_BOOT_SD to CFG_DFU_ALT_BOOT_SD
   CONFIG_DFU_ALT_SYSTEM to CFG_DFU_ALT_SYSTEM
   CONFIG_DFU_ENV_SETTINGS to CFG_DFU_ENV_SETTINGS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/pico-imx7d.h b/include/configs/pico-imx7d.h
index 83907b0..5819215 100644
--- a/include/configs/pico-imx7d.h
+++ b/include/configs/pico-imx7d.h
@@ -15,7 +15,7 @@
 /* MMC Config */
 #define CFG_SYS_FSL_ESDHC_ADDR	0
 
-#define CONFIG_DFU_ENV_SETTINGS \
+#define CFG_DFU_ENV_SETTINGS \
 	"dfu_alt_info=" \
 		"spl raw 0x2 0x400;" \
 		"u-boot raw 0x8a 0x1000;" \
@@ -67,7 +67,7 @@
 	"ramdisk_addr_r=0x83000000\0" \
 	"ramdiskaddr=0x83000000\0" \
 	"scriptaddr=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
-	CONFIG_DFU_ENV_SETTINGS \
+	CFG_DFU_ENV_SETTINGS \
 	"findfdt=" \
 		"if test $fdtfile = ask ; then " \
 			"bootmenu -1; fi;" \