ARM: mmp: don't select CACHE_TAUROS2 on all ARCH_MMP

MMP3 has a PJ4B with a Tauros 3 cache controller that uses CACHE_L2X0
instead, while CACHE_TAUROS2 is present on PJ4 and PJ1 (Mohawk) based
platforms only.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>

arch/arm/mm/Kconfig

@@ -1041,7 +1041,7 @@ endif
 
 config CACHE_TAUROS2
 	bool "Enable the Tauros2 L2 cache controller"
-	depends on (ARCH_DOVE || ARCH_MMP || CPU_PJ4)
+	depends on (CPU_MOHAWK || CPU_PJ4)
 	default y
 	select OUTER_CACHE
 	help