Blackfin: simplify BF561 coreb driver greatly

Since 90% of this driver can be handled in user space, move it to the
corebld user space application.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/mach-bf561/Kconfig

@@ -9,22 +9,9 @@ if (!SMP)
 comment "Core B Support"
 
 config BF561_COREB
-	bool "Enable Core B support"
+	bool "Enable Core B loader"
 	default y
 
-config BF561_COREB_RESET
-	bool "Enable Core B reset support"
-	default n
-	help
-	  This requires code in the application that is loaded
-	  into Core B. In order to reset, the application needs
-	  to install an interrupt handler for Supplemental
-	  Interrupt 0, that sets RETI to 0xff600000 and writes
-	  bit 11 of SICB_SYSCR when bit 5 of SICA_SYSCR is 0.
-	  This causes Core B to stall when Supplemental Interrupt
-	  0 is set, and will reset PC to 0xff600000 when
-	  COREB_SRAM_INIT is cleared.
-
 endif
 
 comment "Interrupt Priority Assignment"