Blackfin: unify duplicate MEM_MT48LC32M8A2_75 kconfig options

Reported-by: Christoph Egger <siccegge@cs.fau.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/Kconfig

@@ -348,7 +348,7 @@ config MEM_MT48LC16M16A2TG_75
 
 config MEM_MT48LC32M8A2_75
 	bool
-	depends on (BFIN537_STAMP || PNAV10 || BFIN538_EZKIT)
+	depends on (BFIN518F_EZBRD || BFIN537_STAMP || PNAV10 || BFIN538_EZKIT)
 	default y
 
 config MEM_MT48LC8M32B2B5_7
@@ -361,11 +361,6 @@ config MEM_MT48LC32M16A2TG_75
 	depends on (BFIN527_EZKIT || BFIN527_EZKIT_V2 || BFIN532_IP0X || BLACKSTAMP)
 	default y
 
-config MEM_MT48LC32M8A2_75
-	bool
-	depends on (BFIN518F_EZBRD)
-	default y
-
 config MEM_MT48H32M16LFCJ_75
 	bool
 	depends on (BFIN526_EZBRD)