parisc: Replace hardcoded value with PRIV_USER constant in ptrace.c

Prefer usage of the PRIV_USER constant over the hard-coded value to set
the lowest 2 bits for the userspace privilege.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 5.16+

arch/parisc/kernel/ptrace.c

@@ -166,7 +166,7 @@ long arch_ptrace(struct task_struct *child, long request,
 		     addr >= sizeof(struct pt_regs))
 			break;
 		if (addr == PT_IAOQ0 || addr == PT_IAOQ1) {
-			data |= 3; /* ensure userspace privilege */
+			data |= PRIV_USER; /* ensure userspace privilege */
 		}
 		if ((addr >= PT_GR1 && addr <= PT_GR31) ||
 				addr == PT_IAOQ0 || addr == PT_IAOQ1 ||
@@ -285,7 +285,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 			if (addr >= sizeof(struct pt_regs))
 				break;
 			if (addr == PT_IAOQ0+4 || addr == PT_IAOQ1+4) {
-				data |= 3; /* ensure userspace privilege */
+				data |= PRIV_USER; /* ensure userspace privilege */
 			}
 			if (addr >= PT_FR0 && addr <= PT_FR31 + 4) {
 				/* Special case, fp regs are 64 bits anyway */
@@ -484,7 +484,7 @@ static void set_reg(struct pt_regs *regs, int num, unsigned long val)
 	case RI(iaoq[0]):
 	case RI(iaoq[1]):
 			/* set 2 lowest bits to ensure userspace privilege: */
-			regs->iaoq[num - RI(iaoq[0])] = val | 3;
+			regs->iaoq[num - RI(iaoq[0])] = val | PRIV_USER;
 			return;
 	case RI(sar):	regs->sar = val;
 			return;