Blackfin arch: Fix Warning add some defines in BF54x header file

Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

include/asm-blackfin/mach-bf548/defBF54x_base.h

@@ -3050,6 +3050,15 @@
 #define                  FIFO_RWM  0x18000000 /* FIFO Regular Watermarks */
 #define                  FIFO_UWM  0x60000000 /* FIFO Urgent Watermarks */
 
+#define DLEN_8		(0 << 15) /* 000 - 8 bits */
+#define DLEN_10		(1 << 15) /* 001 - 10 bits */
+#define DLEN_12		(2 << 15) /* 010 - 12 bits */
+#define DLEN_14		(3 << 15) /* 011 - 14 bits */
+#define DLEN_16		(4 << 15) /* 100 - 16 bits */
+#define DLEN_18		(5 << 15) /* 101 - 18 bits */
+#define DLEN_24		(6 << 15) /* 110 - 24 bits */
+
+
 /* Bit masks for EPPIx_FS2W_LVB */
 
 #define                   F1VB_BD  0xff       /* Vertical Blanking before Field 1 Active Data */