aarch64: add new HWCAP2_ macros from linux v5.6

added in

  linux commit 1a50ec0b3b2e9a83f1b1245ea37a853aac2f741c
  arm64: Implement archrandom.h for ARMv8.5-RNG

  linux commit d4209d8b717311d114b5d47ba7f8249fd44e97c2
  arm64: cpufeature: Export matrix and other features to userspace

arch/aarch64/bits/hwcap.h

@@ -40,3 +40,11 @@
 #define HWCAP2_SVESM4		(1 << 6)
 #define HWCAP2_FLAGM2		(1 << 7)
 #define HWCAP2_FRINT		(1 << 8)
+#define HWCAP2_SVEI8MM		(1 << 9)
+#define HWCAP2_SVEF32MM		(1 << 10)
+#define HWCAP2_SVEF64MM		(1 << 11)
+#define HWCAP2_SVEBF16		(1 << 12)
+#define HWCAP2_I8MM		(1 << 13)
+#define HWCAP2_BF16		(1 << 14)
+#define HWCAP2_DGH		(1 << 15)
+#define HWCAP2_RNG		(1 << 16)