kselftest/arm64: Add FEAT_RPRFM to the hwcap test

Since the newly added instruction is in the HINT space we can't reasonably
test for it actually being present.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20221017152520.1039165-5-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

tools/testing/selftests/arm64/abi/hwcap.c

@@ -138,6 +138,12 @@ static const struct hwcap_data {
 		.cpuinfo = "rng",
 		.sigill_fn = rng_sigill,
 	},
+	{
+		.name = "RPRFM",
+		.at_hwcap = AT_HWCAP2,
+		.hwcap_bit = HWCAP2_RPRFM,
+		.cpuinfo = "rprfm",
+	},
 	{
 		.name = "SME",
 		.at_hwcap = AT_HWCAP2,