x86/intel_rdt/mba: Memory bandwith allocation feature detect

Detect MBA feature if CPUID.(EAX=10H, ECX=0):EBX.L2[bit 3] = 1.
Add supporting data structures to detect feature details which is done
in later patch using CPUID with EAX=10H, ECX= 3.

Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: vikas.shivappa@intel.com
Link: http://lkml.kernel.org/r/1491611637-20417-4-git-send-email-vikas.shivappa@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/cpu/intel_rdt.c

@@ -430,6 +430,10 @@ static __init bool get_rdt_resources(void)
 		rdt_get_cache_config(2, &rdt_resources_all[RDT_RESOURCE_L2]);
 		ret = true;
 	}
+
+	if (boot_cpu_has(X86_FEATURE_MBA))
+		ret = true;
+
 	return ret;
 }