unix: update riscv_hwprobe constants

Linux 6.5 enhanced the riscv_hwprobe syscall to detect four new
RISC-V extensions, V, Zba, Zbb and Zbs.  Update the hwprobe
constants in unix so these extensions can be detected by Go
programs.

Updates golang/go#61416

Change-Id: Id6b4566c5c96fe3429fad54e93d3459cb5317642
Reviewed-on: https://go-review.googlesource.com/c/sys/+/530895
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

unix/linux/types.go

@@ -447,6 +447,10 @@ struct my_can_bittiming_const {
 #define RISCV_HWPROBE_KEY_IMA_EXT_0	4
 #define		RISCV_HWPROBE_IMA_FD		(1 << 0)
 #define		RISCV_HWPROBE_IMA_C		(1 << 1)
+#define		RISCV_HWPROBE_IMA_V		(1 << 2)
+#define		RISCV_HWPROBE_EXT_ZBA		(1 << 3)
+#define		RISCV_HWPROBE_EXT_ZBB		(1 << 4)
+#define		RISCV_HWPROBE_EXT_ZBS		(1 << 5)
 #define RISCV_HWPROBE_KEY_CPUPERF_0	5
 #define		RISCV_HWPROBE_MISALIGNED_UNKNOWN	(0 << 0)
 #define		RISCV_HWPROBE_MISALIGNED_EMULATED	(1 << 0)
@@ -5793,6 +5797,10 @@ const (
 	RISCV_HWPROBE_KEY_IMA_EXT_0          = C.RISCV_HWPROBE_KEY_IMA_EXT_0
 	RISCV_HWPROBE_IMA_FD                 = C.RISCV_HWPROBE_IMA_FD
 	RISCV_HWPROBE_IMA_C                  = C.RISCV_HWPROBE_IMA_C
+	RISCV_HWPROBE_IMA_V                  = C.RISCV_HWPROBE_IMA_V
+	RISCV_HWPROBE_EXT_ZBA                = C.RISCV_HWPROBE_EXT_ZBA
+	RISCV_HWPROBE_EXT_ZBB                = C.RISCV_HWPROBE_EXT_ZBB
+	RISCV_HWPROBE_EXT_ZBS                = C.RISCV_HWPROBE_EXT_ZBS
 	RISCV_HWPROBE_KEY_CPUPERF_0          = C.RISCV_HWPROBE_KEY_CPUPERF_0
 	RISCV_HWPROBE_MISALIGNED_UNKNOWN     = C.RISCV_HWPROBE_MISALIGNED_UNKNOWN
 	RISCV_HWPROBE_MISALIGNED_EMULATED    = C.RISCV_HWPROBE_MISALIGNED_EMULATED