powerpc/sstep: Introduce GETTYPE macro

Replace 'op->type & INSTR_TYPE_MASK' expression with GETTYPE(op->type)
macro.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/lib/sstep.c

@@ -2642,7 +2642,7 @@ void emulate_update_regs(struct pt_regs *regs, struct instruction_op *op)
 	unsigned long next_pc;
 
 	next_pc = truncate_if_32bit(regs->msr, regs->nip + 4);
-	switch (op->type & INSTR_TYPE_MASK) {
+	switch (GETTYPE(op->type)) {
 	case COMPUTE:
 		if (op->type & SETREG)
 			regs->gpr[op->reg] = op->val;
@@ -2740,7 +2740,7 @@ int emulate_loadstore(struct pt_regs *regs, struct instruction_op *op)
 
 	err = 0;
 	size = GETSIZE(op->type);
-	type = op->type & INSTR_TYPE_MASK;
+	type = GETTYPE(op->type);
 	cross_endian = (regs->msr & MSR_LE) != (MSR_KERNEL & MSR_LE);
 	ea = truncate_if_32bit(regs->msr, op->ea);
 
@@ -3002,7 +3002,7 @@ int emulate_step(struct pt_regs *regs, unsigned int instr)
 	}
 
 	err = 0;
-	type = op.type & INSTR_TYPE_MASK;
+	type = GETTYPE(op.type);
 
 	if (OP_IS_LOAD_STORE(type)) {
 		err = emulate_loadstore(regs, &op);