Blackfin arch: add TWIx_REGBASE and SPIx_REGBASE to specific CPU header files, use the new REGBASE for board platform resources

Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/include/asm-blackfin/mach-bf548/defBF548.h b/include/asm-blackfin/mach-bf548/defBF548.h
index 8d4214e..70af33c 100644
--- a/include/asm-blackfin/mach-bf548/defBF548.h
+++ b/include/asm-blackfin/mach-bf548/defBF548.h
@@ -120,6 +120,7 @@
 
 /* Two Wire Interface Registers (TWI1) */
 
+#define                     TWI1_REGBASE  0xffc02200
 #define                      TWI1_CLKDIV  0xffc02200   /* Clock Divider Register */
 #define                     TWI1_CONTROL  0xffc02204   /* TWI Control Register */
 #define                  TWI1_SLAVE_CTRL  0xffc02208   /* TWI Slave Mode Control Register */
@@ -139,6 +140,7 @@
 
 /* SPI2  Registers */
 
+#define                     SPI2_REGBASE  0xffc02400
 #define                         SPI2_CTL  0xffc02400   /* SPI2 Control Register */
 #define                         SPI2_FLG  0xffc02404   /* SPI2 Flag Register */
 #define                        SPI2_STAT  0xffc02408   /* SPI2 Status Register */