perf/x86/intel/uncore: Add scaling units to the EP iMC events

perf/x86/intel/uncore: Add scaling units to the EP iMC events

Add scaling to MB/s to the memory controller read/write
events for Sandy/IvyBridge/Haswell-EP similar to how the client
does. This makes the events easier to use from the
standard perf tool.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Link: http://lkml.kernel.org/r/1415062828-19759-2-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>