ARM: kprobes: Fix unreliable MRS instruction tests

For the instruction 'mrs Rn, cpsr' the resulting value of Rn can vary due to
external factors we can't control. So get the test code to mask out these
indeterminate bits.

Signed-off-by: Jon Medhurst <tixy@linaro.org>

diff --cc arch/arm/probes/kprobes/test-arm.c
Simple merge

diff --cc arch/arm/probes/kprobes/test-core.c
Simple merge

diff --cc arch/arm/probes/kprobes/test-core.h
Simple merge

diff --cc arch/arm/probes/kprobes/test-thumb.c
Simple merge