bfin: make the CPU macro of LDR target more genenric

Remove BFIN from the CPU macro in Makefile.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>

Makefile

@@ -827,7 +827,7 @@ u-boot.bin: u-boot FORCE
 
 u-boot.ldr:	u-boot
 		$(CREATE_LDR_ENV)
-		$(LDR) -T $(CONFIG_BFIN_CPU) -c $@ $< $(LDR_FLAGS)
+		$(LDR) -T $(CONFIG_CPU) -c $@ $< $(LDR_FLAGS)
 		$(BOARD_SIZE_CHECK)
 
 OBJCOPYFLAGS_u-boot.ldr.hex := -I binary -O ihex

arch/blackfin/include/asm/config.h

@@ -178,4 +178,6 @@
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_ARCH_MISC_INIT
 
+#define CONFIG_CPU CONFIG_BFIN_CPU
+
 #endif