plat-sam: remove CFG_PL310_LOCKED

When locking the PL310 cache, it behaves as disable which lead to poor
performances in Linux.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Tony Han <tony.han@microchip.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

core/arch/arm/plat-sam/conf.mk

@@ -25,7 +25,6 @@ include core/arch/arm/cpu/cortex-a5.mk
 $(call force,CFG_SAMA5D2,y)
 $(call force,CFG_ATMEL_SAIC,y)
 $(call force,CFG_PL310,y)
-$(call force,CFG_PL310_LOCKED,y)
 endif
 
 $(call force,CFG_TEE_CORE_NB_CORE,1)