ARM: mm: Remove Kconfig symbol CACHE_PL310

Commit 20e783e3 ("ARM: 8296/1: cache-l2x0: clean up aurora cache
handling") removed the only user of the Kconfig symbol CACHE_PL310.
Setting CACHE_PL310 is now pointless. Remove its Kconfig entry, and one
select of this symbol.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

arch/arm/mach-at91/Kconfig

@@ -64,7 +64,6 @@ config SOC_SAMA5D4
 	select SOC_SAMA5
 	select CLKSRC_MMIO
 	select CACHE_L2X0
-	select CACHE_PL310
 	select HAVE_FB_ATMEL
 	select HAVE_AT91_UTMI
 	select HAVE_AT91_SMD

arch/arm/mm/Kconfig

@@ -892,13 +892,6 @@ config CACHE_L2X0
 
 if CACHE_L2X0
 
-config CACHE_PL310
-	bool
-	default y if CPU_V7 && !(CPU_V6 || CPU_V6K)
-	help
-	  This option enables optimisations for the PL310 cache
-	  controller.
-
 config PL310_ERRATA_588369
 	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
 	help