rch/arm/armv7-a/l2cc_pl310.h: Move arch/arm/sama5/chip/sam_l2cc.h to...

rch/arm/armv7-a/l2cc_pl310.h:  Move arch/arm/sama5/chip/sam_l2cc.h to arch/arm/armv7-a/l2cc_pl310.h.  Adjust the two corresponding Kconfig files as well.