Blackfin arch: cleanup BF54x header file and add BF547 definition

Signed-off-by: NMike Frysinger <michael.frysinger@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

include/asm-blackfin/mach-bf548/bf548.h

@@ -106,24 +106,22 @@
 
 #define AMGCTLVAL	(V_AMBEN | V_AMCKEN)
 
-#ifdef CONFIG_BF542
-#define CPU "BF542"
-#define CPUID 0x027c8000
-#endif
-#ifdef CONFIG_BF544
-#define CPU "BF544"
-#define CPUID 0x027c8000
-#endif
-#ifdef CONFIG_BF548
-#define CPU "BF548"
-#define CPUID 0x027c6000
-#endif
-#ifdef CONFIG_BF549
-#define CPU "BF549"
-#endif
-#ifndef CPU
-#define	CPU "UNKNOWN"
-#define CPUID 0x0
+#if defined(CONFIG_BF542)
+# define CPU   "BF542"
+# define CPUID 0x027c8000
+#elif defined(CONFIG_BF544)
+# define CPU "BF544"
+# define CPUID 0x027c8000
+#elif defined(CONFIG_BF547)
+# define CPU "BF547"
+#elif defined(CONFIG_BF548)
+# define CPU "BF548"
+# define CPUID 0x027c6000
+#elif defined(CONFIG_BF549)
+# define CPU "BF549"
+#else
+# define CPU "UNKNOWN"
+# define CPUID 0x0
 #endif
 
 #endif	/* __MACH_BF48_H__  */