Blackfin arch: Add missing definitions of BF54x

Signed-off-by: NRobin Getz <robin.getz@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

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

@@ -2252,6 +2252,13 @@
 #define                   PLL_OFF  0x2        /* Disable PLL */
 #define                        DF  0x1        /* Divide Frequency */
 
+/* SWRST Masks */
+#define              SYSTEM_RESET 0x0007       /* Initiates A System Software Reset */
+#define              DOUBLE_FAULT 0x0008       /* Core Double Fault Causes Reset */
+#define              RESET_DOUBLE 0x2000       /* SW Reset Generated By Core Double-Fault */
+#define                RESET_WDOG 0x4000       /* SW Reset Generated By Watchdog Timer */
+#define            RESET_SOFTWARE 0x8000       /* SW Reset Occurred Since Last Read Of SWRST */
+
 /* Bit masks for PLL_STAT */
 
 #define                PLL_LOCKED  0x20       /* PLL Locked Status */