[Blackfin] arch: add EBIU supporting for BF54x EZKIT SMSC LAN911x/LAN921x families embedded ethernet driver

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/Kconfig

@@ -832,6 +832,7 @@ config BANK_0
 config BANK_1
 	hex "Bank 1"
 	default 0x7BB0
+	default 0x5558 if BF54x
 
 config BANK_2
 	hex "Bank 2"