aarch64: add HWCAP2_ macros from linux v5.3

these were missed before, added in

  linux commit 1201937491822b61641c1878ebcd16a93aed4540
  arm64: Expose ARMv8.5 CondM capability to userspace

  linux commit ca9503fc9e9812aa6258e55d44edb03eb30fc46f
  arm64: Expose FRINT capabilities to userspace

arch/aarch64/bits/hwcap.h

@@ -38,3 +38,5 @@
 #define HWCAP2_SVEBITPERM	(1 << 4)
 #define HWCAP2_SVESHA3		(1 << 5)
 #define HWCAP2_SVESM4		(1 << 6)
+#define HWCAP2_FLAGM2		(1 << 7)
+#define HWCAP2_FRINT		(1 << 8)