x86/cpu: Add model number for another Intel Arrow Lake mobile processor

This one is the regular laptop CPU.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240322161725.195614-1-tony.luck@intel.com

arch/x86/include/asm/intel-family.h

@@ -127,6 +127,7 @@
 
 #define INTEL_FAM6_ARROWLAKE_H		0xC5
 #define INTEL_FAM6_ARROWLAKE		0xC6
+#define INTEL_FAM6_ARROWLAKE_U		0xB5
 
 #define INTEL_FAM6_LUNARLAKE_M		0xBD