There was a bug in handling of the mxcsr register since cpu flags
were not getting updated after fxrstor operations. This small tweak
fixes that.
[YOCTO #5248]
(From OE-Core rev: 5dc43cdc08e6698afa16ba79f3506a1555bb3710)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>