KVM: ARM: Remove non-ASCII space characters

Some strange character leaped into the documentation, which makes
git-send-email behave quite strangely.  Get rid of this before it bites
anyone else.

Cc: Anup Patel <anup.patel@linaro.org>
Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>

Documentation/virtual/kvm/api.txt

@@ -2312,7 +2312,7 @@ Type: vm ioctl
 Parameters: struct struct kvm_vcpu_init (out)
 Returns: 0 on success; -1 on error
 Errors:
-  ENODEV:    no preferred target available for the host
+  ENODEV:    no preferred target available for the host
 
 This queries KVM for preferred CPU target type which can be emulated
 by KVM on underlying host.